Wi-Fi looses connect after Andoid 9 update on XZ2c

[mxvtt]

Hi,
After performing OTA update to Android 9 Pie WiFi started to experience serios problems.
It connects to Wi-Fi routers like before, but keep constantly loosing connection. The indication in the status bar is like normal. However all apps requiring internet stop working.

In Twitter app, you can browse the tweets but when you want to update the screen you have 'Unable to get tweets at this time'
In Gmail app, you can browse emails in a folder but when you switch to other folder you will have 'Connection error, retry'
In eBay app, you may go into Bids area of the app and see your bids, but when you switch to a lot the app locks.
WiFi calling is not working.

This problem was reported many times this summer, when Pie was available for beta download (Reddit and Google dev forums have a long list of reports). It was suggested that:
-disable\enable WiFi trick can work this out. (It cannot with XZ2c)
-disable IPv6 in router as the Pie tries to establish IPv6 connection (It is not a solution when you are not an admin of a router, but I checked on 3 networks and diffrent models by disabling IPv6- no use).
-disable WiFi discovery in WiFi settings (it does not work).
-reset network setting (I did lost all my saved networks, but it did not help).

I contacted Sony Support and the only suggestions is that OTA update did not go well, so they want me to make update again via Xperia Companion. Meaning hours of backup and loosing information and settings of dozens of apps.

According to the reports (you can google "WiFi issues after Android Pie update") making factory reset is not a solution. I will try to restore the updated Android 9 via Xperia Companion.

But this is the serious issue equal to bricking a phone that quite new yet. (((((((

 

[FcukBloat]

seems I am experiencing this as well sometimes after PIE update... sh!t..

 

[mxvtt]

I made clean install via Xperia Companion and it did not help. Sony wants me to bring it to the service.

Is there a way to roll back to Android 8.1?

 

[real_marsman]

Is there a way to roll back to Android 8.1?

Yes, install flashtool and download a firmware that is still on Oreo (check version number). I used the SG one (4G icon and NFC persistent icon). After flashing it, you most likely end up in a bootloop. Fix this with Experia Companion. Don't wait to long though; once Pie is available for all regions, you can't use Companion to fix the bootloop AND stay on Oreo. You will be stuck with Pie. Good luck!

 

[mxvtt]

Yes, install flashtool and download a firmware that is still on Oreo (check version number). I used the SG one (4G icon and NFC persistent icon). After flashing it, you most likely end up in a bootloop. Fix this with Experia Companion. Don't wait to long though; once Pie is available for all regions, you can't use Companion to fix the bootloop AND stay on Oreo. You will be stuck with Pie. Good luck!

Sound near impossible. When can I get the latest Oreo for ZX2c? Can you guide me to flashtool thread, so that I could read how to do it?

 

[real_marsman]

It's not too difficult. All you need to know is at flashtool.net

 

[mxvtt]

Installed previous firmware, all problems gone!! Even the speed is faster than on Android Pie
Now I need to find out how to hide Sony's 'New software available' from the notifications.

 

[FcukBloat]

Installed previous firmware, all problems gone!! Even the speed is faster than on Android Pie
Now I need to find out how to hide Sony's 'New software available' from the notifications.

if you find out please share... did it appear even disabling the auto-update in settings?

and you had to factory reset to revert succesfully to Oreo I think? can you list the steps you followed? I may be interested in reverting to oreo as well until pie will be more stable...tia!

 

[mxvtt]

if you find out please share... did it appear even disabling the auto-update in settings?

and you had to factory reset to revert succesfully to Oreo I think? can you list the steps you followed? I may be interested in reverting to oreo as well until pie will be more stable...tia!

1) I donwloaded and installed flashtool
2) I dowloaded and installed the driver https://developer.sony.com/file/download/xperia-xz2-driver/
3) I find the previous firmware for my region, the latest is 51.1.A.11.51 . It is one big 2.2 Gb *.ftf file, I put it into C:\Users\**yourname*\.flashTool\firmwares on my Win7 pc
4) Run the flashtool and pressed the flash button
5) when prompted I switched off the phone, pressed volume down button and then inserted the USB into phone and pc
6) Waited 7-8 minutes untill the flashing is finished.
Disconnected the phone, pressed power and in 10 minutes I have this cool device up and running like it should!

 

[FcukBloat]

1) I donwloaded and installed flashtool
2) I dowloaded and installed the driver https://developer.sony.com/file/download/xperia-xz2-driver/
3) I find the previous firmware for my region, the latest is 51.1.A.11.51 . It is one big 2.2 Gb *.ftf file, I put it into C:\Users\**yourname*\.flashTool\firmwares on my Win7 pc
4) Run the flashtool and pressed the flash button
5) when prompted I switched off the phone, pressed volume down button and then inserted the USB into phone and pc
6) Waited 7-8 minutes untill the flashing is finished.
Disconnected the phone, pressed power and in 10 minutes I have this cool device up and running like it should!

thanks I already downloaded the .11.51 firmware also, but I don't have the ftf, I have all files extracted... probably because I selected to unpack it automatically.. but I thought I still could find the ftf somewhere... will download it again without the unpacking this time and see.

this way it cleared all your data right? and wiped internal sd also maybe? or all your data was still there after the downgrade?

 

[mxvtt]

thanks I already downloaded the .11.51 firmware also, but I don't have the ftf, I have all files extracted... probably because I selected to unpack it automatically.. but I thought I still could find the ftf somewhere... will download it again without the unpacking this time and see.

this way it cleared all your data right? and wiped internal sd also maybe? or all your data was still there after the downgrade?

SD card remained untouched. But flashin wiped all personal data from the phone

 

[FcukBloat]

SD card remained untouched. But flashin wiped all personal data from the phone

thanks for the info, fastory reset is not a big problem for me, I think I am downgrading also soon! don't like pies... :laugh: redownloading ftf now and flashtool (which is taking ages to complete download... so slow!)

edit: even without unpacking I don't have the ftf but three separated files, will google to see how to create the ftf from the firmware files!

 

[FcukBloat]

nvm

 

[FcukBloat]

downgrade successful, great to see Oreo running again! quick settings icons in pie are just horrible..
no update notification here yet, but probably just because the ftf i chose (customized ce1) has no pie update available yet...!

 

[mxvtt]

downgrade successful, great to see Oreo running again! quick settings icons in pie are just horrible..
no update notification here yet, but probably just because the ftf i chose (customized ce1) has no pie update available yet...!

Glad to hear that you succeded! Congrats!

I have read some advice that AdGuard app can block Sony Software Updates, but it required installation of crapware (unnecessary browsers) so I will look into other possibilities to block it. This exercise with Pie update made me spend long hours backing up and restoring, so I will need more time.

Offtopic: I have blocked updates on Win 10, Mozilla and now it is time for my Android phone. What is this world coming to...

 

[FcukBloat]

Glad to hear that you succeded! Congrats!

I have read some advice that AdGuard app can block Sony Software Updates, but it required installation of crapware (unnecessary browsers) so I will look into other possibilities to block it. This exercise with Pie update made me spend long hours backing up and restoring, so I will need more time.

Offtopic: I have blocked updates on Win 10, Mozilla and now it is time for my Android phone. What is this world coming to...

I'm using adguard to block ads in browser.. maybe if we disable the Sony sw update app via adb will do the trick? i did this to disable some system apps that were not possible to disable from settings (SwiftKey keyboard etc)

i don't mind about future updates so will try tomorrow if i have time and see what happens!

 

[FcukBloat]

disabled all update relevant apps from the phone via adb shell.. I hope this will prevent the ota update to show up, will see when the PIE update for CE1 will be released! :fingers-crossed::fingers-crossed:

 

[mxvtt]

disabled all update relevant apps from the phone via adb shell.. I hope this will prevent the ota update to show up, will see when the PIE update for CE1 will be released! :fingers-crossed::fingers-crossed:

Can you guide me how you do it exactly? (Explain me like I am 5, please )

 

[FcukBloat]

Can you guide me how you do it exactly? (Explain me like I am 5, please )

you must install minimal adb for windows and send the adb command, I did it on win10 and it worked fine. also disabled headsup notifications this way, hate them!

when you have minimal adb installed, connect the phone via usb (when it is on and debug mode enabled in advanced settings) open a command prompt from the folder where you have adb.exe and run:

adb devices
... to check if your phone is seen. if so, run the following commands to disable sony update apps:

pm uninstall -k --user 0 com.sonyericsson.updatecenter
pm uninstall -k --user 0 com.sonymobile.mtp.extension.fotaupdate
pm uninstall -k --user 0 com.sonyericsson.mtp.extension.update
pm uninstall -k --user 0 com.sonymobile.updatecenter.config.latecmz
pm uninstall -k --user 0 com.sonymobile.updatecenter.config.autoinstall


doing like this now when I go to settings > sw update I have now the stock android update app opening, not the sony app anymore, so hope the sony updates won't be seen anymore!

if you have already the notification always shown you can try the above and see if after rebooting the phone, it disappears or not..


let me know!

 

[FcukBloat]

see