[GUIDE][ROOT] How to Root the CAT s60 ... ... and more !!!

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adtbm

Member
Jul 20, 2012
30
31
EDIT 2019: rooting with TWRP from 038 read at the bottom of this post

HOW TO.... Stock, Update, custom recovery and root your s60 !!!!
Disclaimer: if you brick your phone, it's your fault, i have tested this way of rooting my s60 now for a several times and it works 100%
SO READ TWICE, CHECK TWICE, BEFORE YOU CLICK ONCE !!!!! i will not take any responsibility !!!
!!! ONCE AGAIN, READ THE WHOLE GUIDE BEFORE YOU START !!!


OK, now we start:
Thanks to everybody who contributed and made the root possible, here in this thread (Cesarq, OpenMinded, Tuschi, BetonJohn, etc.......) the software in the link further down, is the collected data, freely available in the net and linked in the original Thread several times, i have only bundled one package and wrote this, hopefully usefull guide.

in principle do as follows: (I will only explain once how to sideload or load via recovery, afterwards i will only state what kind and what file)

Prerequisites
- switch phone OFF
- download my collection of the essential s60 files : Here is my collection
EDIT 2019: - grap the 035 update here from the Thread: Thanks to tusch00101
i did not find the 038 update as a single zip file to download. if somebody could provide it ?
(there are ALL files included to flash stock, update to .035, flash twrp recovery and root.)
(this is for Win7 x86, you have to check if it works for other versions yourself, sy..)
- install USB drivers
(for recovery and adb !!! There are two different USB drivers needed)
- install "minimal ADB and fastboot"
- copy the two updates (update032.zip & update033.zip) into the folder, where you have installed "minimal ADB and fastboot" (makes live easier later)
- install QPST (the version of QPST is the one from Androidmtk and should be virusfree.)

(The version of QFIL in my collection is the one without reboot, so you have to reset/reboot your phone manually (resetbutton below hatchdoor on your phone) whenever stated in this guide.)
- format micro SD card in fat32 ! and copy SuperSU.zip onto it. Then insert microSD card into your phone.
- switch phone ON
- enable Developer Options, by going into the settings menu and go to "About Device". tip/touch/tap 7x the -build number- field. A message will appear: "You're now developer" (something like this)
- enable USB-debugging. Go again to settings, then "Developer Options" and enable USB-debugging.(flick the switch)
- connect a WORKING USB cable to your phone (Not to your PC atm !!!)
- dial *#06# to see the iMEI('s) of either one or both simslots. dial #02# to check what firmware version you are on
(just for your info: It looks like the "S" in the firmware version (LTE_X.....) indicates, that SingleSim only is activated, while the "D" stands for DualSim activated. my s60 had an "S"...;) )
(In my phone the second Sim slot (under the microSD card slot), was blocked with a small piece of, simcard shaped, black plastic. With the help of some tweezers the scrap
plastic was gone easily. Anyway --- BE CAREFULL --- when removing it.)

If you are allready on an LTE_D... Firmware version 033 or above (atm only confirmed up to 035) and you want to root with custom recovery, you only need to follow the last step in this guide ("getting twrp and Root") everybody else, continue reading...

getting twrp (for saving your old firmware only)
- power off phone.
- start minimal adb on your PC
- start QFIL (part of QPST) on your PC
- press VOL+ & VOL- simultanousely and connect phone with PC (it will vibrate once, top right LED starts blinking red, screen stays black) (- DOWNLOAD MODE -)
(just in case: to leave Download mode, disconnect phone from PC, press and hold power button for apprx. 15 seconds)
- as soon as you connect your phone to the PC, QFIL should show the Phone/port in the topline allready
(if not, either try to manually select the port, or you probably still have a problem with the USB drivers or the USB cable !)
- QFIL - tick "Flat Build" (top left)
- QFIL - select Programmer, "browse" to the saved location of "update-twrp-recovery-nobootpatch" and select the "prog_emmc.blablabla...mbn" file and doubleclick
- QFIL - "load XML" ,select rawprogramm, doubleclick, select patch0, doubleclick

- QFIL - click on "download"
- if everything was OK up till now, it should start download - BE PATIENT- and read the status window on QFIL, when it shows "finish download"....
- disconnect phone from PC
- press and hold simultanousely POWER and VOL+ (- RECOVERY MODE -) AND...
- ... use a small tool to push the reset button on the phone under the hatch, while still pressing Power and Vol+ !
- the phone should now be in twrp recovery. If so, do a full backup now to your (allready inserted and fat32 formatted) microSD card!!!


when done

- Power off your phone !

flashing stock 31.02
- enter download mode again (Vol+ & Vol-, connect phone to PC.......)
- this time in QFIL, browse in programmer path to "s60_stockFW_31.02" and select the programmer from there
- load XML's (the ones that belong to Stock31.02)
- start download... this will take a while !!!! BE PATIENT !!!!
- when QFIL status window shows finish download, push the reset button on the phone and let it reboot.

(it is normal, that the phone should restart itself 2, maximum 3 times during the first startup, but sometimes it ends up in a bootloop (Cat Logo, reboot, CAT logo, reboot, etc, etc, .......))
(The bootloop mainly happens, if you clear, in twrp recovery, the whole OS, or if you came from another firmware version (LTE_S... -> LTE_D... i.e., but that's no issue either...).

- if it ends up in a bootloop, no worries, just continue ! Believe me, i did this process now several times !

you are back on stock 31.02 !

- Power off your phone again

Updating to 032
- bring up minimal ADB sideload on your PC (start it, if not allready done in previous step (getting twrp)).
- press and hold POWER and VOL+ button on your phone
- when in stock recovery select (with Volume keys) "adb sideload" and click the Powerbutton
- connect your phone to the PC
- on PC, type into the black ADB Terminal window "adb sideload update032.zip" and hit enter
- if correct USB drivers are installed, phone will start downloading the update now.
- when complete, select clear cache, and clear data then reboot your phone.

(again, same as in the step (flashing stock), if bootloop, no worries, just continue, if it boots up, let it boot up and then..)

you're on 032 now

- Power off the phone again

Updating to 033
- do the same steps as described under "Updating to 032" only difference, type in adb window " adb sideload update033.zip"

EDIT2019: - do the same steps for 035 and 038

(After updating to 038, your phone should boot up normally by now. NO MORE BOOTLOOP !)

getting twrp and Root

- this is the same step as above "getting twrp" only difference, this time, no backup needed and...
- when in twrp-recovery, select "install" browse to your micro SD-card, and...
- install SuperSU.zip from SDcard.

- once more, clear cache and data and reboot.


The phone should boot up now, you should be on FW 033, with custom recovery and root !!!

That's all !!!

Oh, one last thing, whoever is having an s60, where only one simslot is working, this guide unlocks the second Simslot as well !!!
Also the problem, some people had, following the other guides (incorrectly) ! (me included) ! , by not using the right QFIL (the one without reboot), in the old Thread, resulting in a
not working WIFI is no issue anymore :)

EDIT 2019 !!!

Getting TWRP with stock 038 thanks to: CDMCCDMC for the addition !
https://forum.xda-developers.com/showpost.php?p=77978181&postcount=135
 
Last edited:

blindboy7

New member
Nov 1, 2017
1
0
thanks for the awesome guide. works perfectly, but i will say every time I plugged my phone in it recognized it as a new device and had to reinstall drivers.... the first few times i did it i thought QFIL froze so i unplugged to reset, this caused an install failure that could not be rectified. I fixed this by uninstalling and reinstalling the drivers from step one and being more patient.
 

Yanardag

Senior Member
Jan 23, 2005
237
31
Dear adtbm,

the firmware updates (both) are extracted... became signature failure.
Please update your very useful package... thx

best regards
yanardag
 
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Yanardag

Senior Member
Jan 23, 2005
237
31
After flash 32 it is starting and i see the wizzard.
But after flashing 33 and rooting i have no wifi.
İ flashed 31.02 then update 32 and after this i update it ota
To 33 and last to 35 and everything is working root (supersu) (dont use magix)is working with 35 very well. Everything ok (xposed, gravity and so on) thx
 

adtbm

Member
Jul 20, 2012
30
31
After flash 32 it is starting and i see the wizzard.
But after flashing 33 and rooting i have no wifi.
İ flashed 31.02 then update 32 and after this i update it ota
To 33 and last to 35 and everything is working root (supersu) (dont use magix)is working with 35 very well. Everything ok (xposed, gravity and so on) thx

If you don't have Wifi after going to 033, you didn't followed the part of "getting twrp" correctly.

"...... - if everything was OK up till now, it should start download - BE PATIENT- and read the status window on QFIL, when it shows "finish download"....
- disconnect phone from PC
- press and hold simultanousely POWER and VOL+ (- RECOVERY MODE -) AND...
- ... use a small tool to push the reset button on the phone under the hatch, while still pressing Power and Vol+ !

- the phone should now be in twrp recovery. ....."

If you let the phone reboot after flashing the recovery, it will overwrite the boot and your wifi is gone !

But nice to hear, that everything is OK now. Do you have problems with 035 ? some people report, that they having issues with the display camera on 035 ...
 
Last edited:

javizap

Member
Feb 2, 2016
42
9
Sorry for this silly question, but i´ve seen that in other models once you install twrp then you can flash super su, why here you have to downgrade to 0.31 first?

Thank you in advance.
 

adtbm

Member
Jul 20, 2012
30
31
Sorry for this silly question, but i´ve seen that in other models once you install twrp then you can flash super su, why here you have to downgrade to 0.31 first?

Thank you in advance.

Hi,

not sure, if you have read the complete guide, or if you have read through the 28 pages of the original Thread.
I think, it could be possible, (but i did not tested it) to flash the recovery via QFIL directly and then install SuperSU, without going back to 031. But since there are models of the s60 out, where only one Simslot is available (Please read my guide), to get the second slot activated you have to flash an LTE_D... firmware and, thanks to Cesarq, we (only) have atm his 031 firmware available, which is luckywise an LTE_D. firmware !

Like i mentioned in this guide allready, i did not found out the way how to root the s60 (the credit goes to Cesarq) and i also did not find out, how to update to 033 (this credit goes to OpenMinded), i have only collected the software & tools, bundled it and wrote this guide, with the available information written throughout the 28 pages of the original Thread.

So please feel free and test it and write us your result !
 

yesca213

Senior Member
Jan 4, 2011
104
40
ok, just did my s60 last night, everything seemed to go just as described. i just checked and it seems it took the update and the dual sim activation. it didnt take root tho. i tried root checker and titanium and both say no root access. maybe i did the final step wrong? i tried it again with no success. am i supposed to be loading the nobootpatch recovery in qfil as the last step and then install su? thats how i attempted it. any help would be greatly appreciated. thanks in advance!
 

Yanardag

Senior Member
Jan 23, 2005
237
31
If you don't have Wifi after going to 033, you didn't followed the part of "getting twrp" correctly.

"...... - if everything was OK up till now, it should start download - BE PATIENT- and read the status window on QFIL, when it shows "finish download"....
- disconnect phone from PC
- press and hold simultanousely POWER and VOL+ (- RECOVERY MODE -) AND...
- ... use a small tool to push the reset button on the phone under the hatch, while still pressing Power and Vol+ !

- the phone should now be in twrp recovery. ....."

If you let the phone reboot after flashing the recovery, it will overwrite the boot and your wifi is gone !

But nice to hear, that everything is OK now. Do you have problems with 035 ? some people report, that they having issues with the display camera on 035 ...

Nope everything is well. 35 runs without any bugs. For me is importend that xposed is running and that does.
 
Last edited:

adtbm

Member
Jul 20, 2012
30
31
am i supposed to be loading the nobootpatch recovery in qfil as the last step and then install su? thats how i attempted it. any help would be greatly appreciated. thanks in advance!

I asume, you have SuperSU copied onto your microSC card ?!
When you have finished flashing the nobootpatch recovery (QFIL shows finish download), you have to disconnect the phone from the PC, push Vol+ and Power and Reset (under the hatch) at the same time.
Otherwise Bootloader gets overwritten, your Wifi is gone, no custom recovery and no root.
If you are not using the version of QFIL from my package, you probably have a version that automatically reboots when download is finished and you're screwed !!!
If you did it correctly your phone should boot into twrp custom recovery and you should be able to install SuperSU from SD.
 
Last edited:

yesca213

Senior Member
Jan 4, 2011
104
40
I asume, you have SuperSU copied onto your microSC card ?!
When you have finished flashing the nobootpatch recovery (QFIL shows finish download), you have to disconnect the phone from the PC, push Vol+ and Power and Reset (under the hatch) at the same time.
Otherwise Bootloader gets overwritten, your Wifi is gone, no custom recovery and no root.
If you are not using the version of QFIL from my package, you probably have a version that automatically reboots when download is finished and you're screwed !!!
If you did it correctly your phone should boot into twrp custom recovery and you should be able to install SuperSU from SD.
Yes I did have it copied and installed it. I went back and did it again and hit wipe dalvic cache instead of going back in the recovery menu and wiping cache and data. Up and running 33 rooted, everything seems good so far! Thanks [emoji2]

Sent from my S60 using Tapatalk
 

javizap

Member
Feb 2, 2016
42
9
Hi,

not sure, if you have read the complete guide, or if you have read through the 28 pages of the original Thread.
I think, it could be possible, (but i did not tested it) to flash the recovery via QFIL directly and then install SuperSU, without going back to 031. But since there are models of the s60 out, where only one Simslot is available (Please read my guide), to get the second slot activated you have to flash an LTE_D... firmware and, thanks to Cesarq, we (only) have atm his 031 firmware available, which is luckywise an LTE_D. firmware !

Like i mentioned in this guide allready, i did not found out the way how to root the s60 (the credit goes to Cesarq) and i also did not find out, how to update to 033 (this credit goes to OpenMinded), i have only collected the software & tools, bundled it and wrote this guide, with the available information written throughout the 28 pages of the original Thread.

So please feel free and test it and write us your result !

I took your advice and rooted without downgrading firmware. My CAT is double SIM from factory and on 0.35 OTA.

I followed your guide but jumped from backup with twrp to install supersu, following all the steps from there.

Until now everything working fine with root.

One more time I can say that people on XDA is the best!

Regards
 

Yanardag

Senior Member
Jan 23, 2005
237
31
Dear friends,

How can i uninstall google assistant apk?
When i delete it the phone not restart and ended in a bootloop.

When i deactivate it the same bootloop.
 

varonv

New member
Nov 16, 2017
1
0
very very good

Hello to this wonderful group. I did the rooting and it worked wonders, I was very disappointed with my Cat s60, for not being able to use the second sim and for the poor quality of the camera. After the root it became dualsim and the camera improved a lot. in addition to everything that means to be root. I am very grateful to ADTBM and to all those who made this possible. thanks thanks. regards
 

adtbm

Member
Jul 20, 2012
30
31
Dear friends,

How can i uninstall google assistant apk?
When i delete it the phone not restart and ended in a bootloop.

When i deactivate it the same bootloop.

Hi Yanardag,

i have the same problem. Unfortunatley Android IS Google :( . I really don't know how to disable it. Did you try to freeze it with Titanium ?
That's the only thing i could think of. I am annoyed by that Google stuff as well (especially the google assistant....)
This is one of the reasons, why i had to redo my s60 a several times.

So if anybody here finds a way to disable Google assistant, pleasse let us know !!!
@varonv: Nice to hear and thanks for the feedback !
 

ChrisPadduDubbu

New member
Nov 21, 2016
2
0
freeze it with Titanium

Hi Yanardag,

i have the same problem. Unfortunatley Android IS Google :( . I really don't know how to disable it. Did you try to freeze it with Titanium ?
That's the only thing i could think of. I am annoyed by that Google stuff as well (especially the google assistant....)
This is one of the reasons, why i had to redo my s60 a several times.

So if anybody here finds a way to disable Google assistant, pleasse let us know !!!

@varonv: Nice to hear and thanks for the feedback !

I froze it with Titanium: no problems whatsoever.
 

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  • 24
    EDIT 2019: rooting with TWRP from 038 read at the bottom of this post

    HOW TO.... Stock, Update, custom recovery and root your s60 !!!!
    Disclaimer: if you brick your phone, it's your fault, i have tested this way of rooting my s60 now for a several times and it works 100%
    SO READ TWICE, CHECK TWICE, BEFORE YOU CLICK ONCE !!!!! i will not take any responsibility !!!
    !!! ONCE AGAIN, READ THE WHOLE GUIDE BEFORE YOU START !!!


    OK, now we start:
    Thanks to everybody who contributed and made the root possible, here in this thread (Cesarq, OpenMinded, Tuschi, BetonJohn, etc.......) the software in the link further down, is the collected data, freely available in the net and linked in the original Thread several times, i have only bundled one package and wrote this, hopefully usefull guide.

    in principle do as follows: (I will only explain once how to sideload or load via recovery, afterwards i will only state what kind and what file)

    Prerequisites
    - switch phone OFF
    - download my collection of the essential s60 files : Here is my collection
    EDIT 2019: - grap the 035 update here from the Thread: Thanks to tusch00101
    i did not find the 038 update as a single zip file to download. if somebody could provide it ?
    (there are ALL files included to flash stock, update to .035, flash twrp recovery and root.)
    (this is for Win7 x86, you have to check if it works for other versions yourself, sy..)
    - install USB drivers
    (for recovery and adb !!! There are two different USB drivers needed)
    - install "minimal ADB and fastboot"
    - copy the two updates (update032.zip & update033.zip) into the folder, where you have installed "minimal ADB and fastboot" (makes live easier later)
    - install QPST (the version of QPST is the one from Androidmtk and should be virusfree.)

    (The version of QFIL in my collection is the one without reboot, so you have to reset/reboot your phone manually (resetbutton below hatchdoor on your phone) whenever stated in this guide.)
    - format micro SD card in fat32 ! and copy SuperSU.zip onto it. Then insert microSD card into your phone.
    - switch phone ON
    - enable Developer Options, by going into the settings menu and go to "About Device". tip/touch/tap 7x the -build number- field. A message will appear: "You're now developer" (something like this)
    - enable USB-debugging. Go again to settings, then "Developer Options" and enable USB-debugging.(flick the switch)
    - connect a WORKING USB cable to your phone (Not to your PC atm !!!)
    - dial *#06# to see the iMEI('s) of either one or both simslots. dial #02# to check what firmware version you are on
    (just for your info: It looks like the "S" in the firmware version (LTE_X.....) indicates, that SingleSim only is activated, while the "D" stands for DualSim activated. my s60 had an "S"...;) )
    (In my phone the second Sim slot (under the microSD card slot), was blocked with a small piece of, simcard shaped, black plastic. With the help of some tweezers the scrap
    plastic was gone easily. Anyway --- BE CAREFULL --- when removing it.)

    If you are allready on an LTE_D... Firmware version 033 or above (atm only confirmed up to 035) and you want to root with custom recovery, you only need to follow the last step in this guide ("getting twrp and Root") everybody else, continue reading...

    getting twrp (for saving your old firmware only)
    - power off phone.
    - start minimal adb on your PC
    - start QFIL (part of QPST) on your PC
    - press VOL+ & VOL- simultanousely and connect phone with PC (it will vibrate once, top right LED starts blinking red, screen stays black) (- DOWNLOAD MODE -)
    (just in case: to leave Download mode, disconnect phone from PC, press and hold power button for apprx. 15 seconds)
    - as soon as you connect your phone to the PC, QFIL should show the Phone/port in the topline allready
    (if not, either try to manually select the port, or you probably still have a problem with the USB drivers or the USB cable !)
    - QFIL - tick "Flat Build" (top left)
    - QFIL - select Programmer, "browse" to the saved location of "update-twrp-recovery-nobootpatch" and select the "prog_emmc.blablabla...mbn" file and doubleclick
    - QFIL - "load XML" ,select rawprogramm, doubleclick, select patch0, doubleclick

    - QFIL - click on "download"
    - if everything was OK up till now, it should start download - BE PATIENT- and read the status window on QFIL, when it shows "finish download"....
    - disconnect phone from PC
    - press and hold simultanousely POWER and VOL+ (- RECOVERY MODE -) AND...
    - ... use a small tool to push the reset button on the phone under the hatch, while still pressing Power and Vol+ !
    - the phone should now be in twrp recovery. If so, do a full backup now to your (allready inserted and fat32 formatted) microSD card!!!


    when done

    - Power off your phone !

    flashing stock 31.02
    - enter download mode again (Vol+ & Vol-, connect phone to PC.......)
    - this time in QFIL, browse in programmer path to "s60_stockFW_31.02" and select the programmer from there
    - load XML's (the ones that belong to Stock31.02)
    - start download... this will take a while !!!! BE PATIENT !!!!
    - when QFIL status window shows finish download, push the reset button on the phone and let it reboot.

    (it is normal, that the phone should restart itself 2, maximum 3 times during the first startup, but sometimes it ends up in a bootloop (Cat Logo, reboot, CAT logo, reboot, etc, etc, .......))
    (The bootloop mainly happens, if you clear, in twrp recovery, the whole OS, or if you came from another firmware version (LTE_S... -> LTE_D... i.e., but that's no issue either...).

    - if it ends up in a bootloop, no worries, just continue ! Believe me, i did this process now several times !

    you are back on stock 31.02 !

    - Power off your phone again

    Updating to 032
    - bring up minimal ADB sideload on your PC (start it, if not allready done in previous step (getting twrp)).
    - press and hold POWER and VOL+ button on your phone
    - when in stock recovery select (with Volume keys) "adb sideload" and click the Powerbutton
    - connect your phone to the PC
    - on PC, type into the black ADB Terminal window "adb sideload update032.zip" and hit enter
    - if correct USB drivers are installed, phone will start downloading the update now.
    - when complete, select clear cache, and clear data then reboot your phone.

    (again, same as in the step (flashing stock), if bootloop, no worries, just continue, if it boots up, let it boot up and then..)

    you're on 032 now

    - Power off the phone again

    Updating to 033
    - do the same steps as described under "Updating to 032" only difference, type in adb window " adb sideload update033.zip"

    EDIT2019: - do the same steps for 035 and 038

    (After updating to 038, your phone should boot up normally by now. NO MORE BOOTLOOP !)

    getting twrp and Root

    - this is the same step as above "getting twrp" only difference, this time, no backup needed and...
    - when in twrp-recovery, select "install" browse to your micro SD-card, and...
    - install SuperSU.zip from SDcard.

    - once more, clear cache and data and reboot.


    The phone should boot up now, you should be on FW 033, with custom recovery and root !!!

    That's all !!!

    Oh, one last thing, whoever is having an s60, where only one simslot is working, this guide unlocks the second Simslot as well !!!
    Also the problem, some people had, following the other guides (incorrectly) ! (me included) ! , by not using the right QFIL (the one without reboot), in the old Thread, resulting in a
    not working WIFI is no issue anymore :)

    EDIT 2019 !!!

    Getting TWRP with stock 038 thanks to: CDMCCDMC for the addition !
    https://forum.xda-developers.com/showpost.php?p=77978181&postcount=135
    4
    OK, so heres how i got v38 rooted with TWRP

    1. Flashed Stock 31.02 with QFIL
    2. With ADB Sideloaded v32, then clear data/wipe cache, click restart, let the phone bootup untill it says choose language.
    3. Repeat step 2 untill you sideload all v33, v35, v38 updates with clear data/wipe cache and restart after each one is finished and let phone boot till that language screen each time.
    3. After installing v38 let the phone boot fully, login to your google account and so on.
    4. Turn the phone off.
    5. Get in to the DOWNLOAD mode (hold "volume +" and "volume -" at the same time and plug in the USB cable) red light should start blinking.
    6. Install update-twrp-recovery-nobootpatch with QFIL.
    7. After TWRP finished installing, unplug the USB and go in to recovery (power button + "volume +")
    8. Swipe right to allow system modification.
    9. Click "Install" and install SuperSU-v2.82-201705271822.zip from your SD card.
    10. Wipe cache thing and reboot.

    After phone booted up i installed root check to check if the root is there, it was. Then restarted the phone few times to see if TWRP is still there, and it was still there.
    2
    Hi All.
    I noticed that the links are dead. So here are the update*.zip files and other things (TWRP, QPST, drivers) I used in a rar file. Also, rather than use the SuperSU stuff, just use Magisk with the TWRP included, works like a charm. Personally I'm pleased with the phone, though I see it gets a lot of hate.
    2
    am i supposed to be loading the nobootpatch recovery in qfil as the last step and then install su? thats how i attempted it. any help would be greatly appreciated. thanks in advance!

    I asume, you have SuperSU copied onto your microSC card ?!
    When you have finished flashing the nobootpatch recovery (QFIL shows finish download), you have to disconnect the phone from the PC, push Vol+ and Power and Reset (under the hatch) at the same time.
    Otherwise Bootloader gets overwritten, your Wifi is gone, no custom recovery and no root.
    If you are not using the version of QFIL from my package, you probably have a version that automatically reboots when download is finished and you're screwed !!!
    If you did it correctly your phone should boot into twrp custom recovery and you should be able to install SuperSU from SD.
    2
    So I spent the greater part of the weekend working to get update to 038.
    Two important things I discovered:
    1. OTA update from 032 to 038 seems to work!
      • Flash stock 031 with QFIL
      • ADB sideload to 032
      • Boot
      • Connect to WiFi
      • Wait
      • Receive update notification about 038 update (140 MB)
      • Proceed with update
    2. Rooting 038 with Magisk 17.1 did not work for me. I made multiple attempts and each time after installing Magisk, the next boot asked me for a boot password and nothing I tried worked - default_password, all of my own passwords I could think of - with unlock password set first, without unlock password set first...
    3. Rooting 038 with Magisk 15.3 did work - no unexpected boot password - and upgrading to Magisk 17.1 afterward worked fine. Not sure why, but as I need my phone to work, I'm not planning to do any more fiddling.
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