[GUIDE] Xiaomi Qin F21 Pro with US Bands

[samtee237]

My phone has a unlocked bootloader and I found some other processes online to flash the TWRP image part of the process is rebooting your phone to bootloader so it comes up on my screen flash boot but for some reason my computer doesn't pick it up when I run the flash command it says waiting for device

 

[nemoslumbers]

My phone has a unlocked bootloader and I found some other processes online to flash the TWRP image part of the process is rebooting your phone to bootloader so it comes up on my screen flash boot but for some reason my computer doesn't pick it up when I run the flash command it says waiting for device

Which process for flashing it did you use? And did you already have the unlocked google version with a bootloader like the moogpunk user above?

Also, I don't mean to be rude, but it's for the sake of clarity: it's a bit hard to tell if you mean you successfully did something or ran into issues. Could you put some periods in your post?

 

[moogpunk]

On step five it says to only check off three files, but they are not on this list unless they are under a different name. What am I missing?

Where is nvcfg??? Nvdata? Nvram?? I see md1mg_a but that is it

 

[Potential_Threat]

View attachment 5914589
On step five it says to only check off three files, but they are not on this list unless they are under a different name. What am I missing?

Where is nvcfg???

Okay I see your problem you did not select the correct scatter file.
The correct files are in "F30 US LTE Bands Package>F30 US LTE Bands Package>F30 Modem Files for Flashing with SPFlash Tool", in there you'll see MT6761_Android_scatter - edited.txt look at attached screenshot.

 

[Potential_Threat]

Okay I see your problem you did not select the correct scatter file.
The correct files are in "F30 US LTE Bands Package>F30 US LTE Bands Package>F30 Modem Files for Flashing with SPFlash Tool", in there you'll see MT6761_Android_scatter - edited.txt look at attached screenshot.

View attachment 5914589
On step five it says to only check off three files, but they are not on this list unless they are under a different name. What am I missing?

Where is nvcfg??? Nvdata? Nvram?? I see md1mg_a but that is it

I can see the scatter loading file on your screen is that of an F21, you have to change that to the location mentioned in my previous post. I think the scatter file you're loading in your pic is the one used to unlock the phone's bootloader in the first step.

 

[Potential_Threat]

View attachment 5914589
On step five it says to only check off three files, but they are not on this list unless they are under a different name. What am I missing?

Where is nvcfg??? Nvdata? Nvram?? I see md1mg_a but that is it

Do you think you made this mistake while doing it the first time around? Hence the bands not changing issue.

 

[moogpunk]

100% UNLOCK SUCCESS I WILL UPDATE LATER THANKS!

FYI, YOU CAN DO THIS ENTIRE TUTORIAL ON A VIRTUAL MACHINE -EXCEPT- UNLOCK YOUR F21 WHICH YOU DO NEED A WINDOWS COMPUTER FOR BECAUSE YOU CANNOT PROPERLY INSTALL USBDK DRIVERS ON A MAC VIRTUAL MACHINE. THIS IS THE ONLY WAY TO GET YOUR COMPUTER TO RECOGNIZE THE PHONE DURING THE BOOTLOADER UNLOCK PROCESS, A NATIVE WINDOWS COMPUTER

EVERYTHING ELSE CAN BE DONE ON OSX

 

[Potential_Threat]

100% SUCCESS I WILL UPDATE LATER THANKS!

Happy to have helped

 

[moogpunk]

okay ive been testing the phones cellular connectivity and it seems it doesn't hold a phone call for longer than 1 minute and then I get an error telling me to enable wifi calling. is this due to my geographical location or does Verizon think something weird is going on and im getting booted?

is there any reason for my to call Verizon and register this imei with them??? the phone I am swapping was already activated and on a plan with a SIM card on a currently active network so I dont think the issue is that... but perhaps the connectivity of the new phones network settings, something in the software settings? I already reset all the cellular settings on the phone. guessing. I don't really know what I am talking about.

Hi
I have been using this flashed US Bands thing on my phone, and I notice there's few places that my phone just gets thrown off service, I can be in middle of a call and the call ends, etc
Also I miss a lot of calls due to it getting thrown off service in certain areas. (not talking here in basements etc, just random on street)
Anybody else experience such issues?

im having the same problem. did you figure this out? do you have a 4g SIM card and not a 5g one? I wonder if there is something going on in the phones settings where it is switching networks or something automatically when in poor reception areas

I called Verizon they said that it might be that my SIM card is outdated (4g) vs 5g SIM card... but if that is not the issue they said its the device. im hoping its just an outdated SIM card.

they were asking me for the ICC ID number for the new device which was not showing up on my phone in the about section with the SIM card installed. there was not even anything in the menu for it "ICC". why couldn't I find the ICCID? did I do something wrong when I wrote the IMEI information to the new phone? Again, the phone will make a perfectly fine phone call for about 1 minute and then drop. cell towers will completely blank out for about 10 seconds and then ill get normal reception again. it seems like it's constantly rebooting cell tower coverage on its own or something? even if I don't make a phone call, the reception will completely drop and then come back every 60-90 seconds... why? it's so frustrating that I am so close to getting this work perfectly and the phone is fully rooted, unlocked, up to date with apps but doesn't hold a call for longer than a minute! I'd rather not to be able to make a phone call at all. First, it didn't work unless I made a call on wifi calling only... now I can get network calls to work temporarily... it's like I am inching closer to the finish line.

I'm sorry I haven't had any issues at all except for one time when I ran out of data unknowingly. What phone provider are you with? You might have to manually add their APNs to your settings.

how do I manually add Verizons apns to my settings?

Do you think you made this mistake while doing it the first time around? Hence the bands not changing issue.

yes I think I was just doing things out of order which was my mistake, but the truth is nothing would have really worked until I properly unlocked the phone the right way. now that I have confirmed my VZW LTE Bands are active, I have a new set of issues.

 

[Potential_Threat]

okay ive been testing the phones cellular connectivity and it seems it doesn't hold a phone call for longer than 1 minute and then I get an error telling me to enable wifi calling. is this due to my geographical location or does Verizon think something weird is going on and im getting booted?

is there any reason for my to call Verizon and register this imei with them??? the phone I am swapping was already activated and on a plan with a SIM card on a currently active network so I dont think the issue is that... but perhaps the connectivity of the new phones network settings, something in the software settings? I already reset all the cellular settings on the phone. guessing. I don't really know what I am talking about.


im having the same problem. did you figure this out? do you have a 4g SIM card and not a 5g one? I wonder if there is something going on in the phones settings where it is switching networks or something automatically when in poor reception areas

I called Verizon they said that it might be that my SIM card is outdated (4g) vs 5g SIM card... but if that is not the issue they said its the device. im hoping its just an outdated SIM card.

they were asking me for the ICC ID number for the new device which was not showing up on my phone in the about section with the SIM card installed. there was not even anything in the menu for it "ICC". why couldn't I find the ICCID? did I do something wrong when I wrote the IMEI information to the new phone? Again, the phone will make a perfectly fine phone call for about 1 minute and then drop. cell towers will completely blank out for about 10 seconds and then ill get normal reception again. it seems like it's constantly rebooting cell tower coverage on its own or something? even if I don't make a phone call, the reception will completely drop and then come back every 60-90 seconds... why? it's so frustrating that I am so close to getting this work perfectly and the phone is fully rooted, unlocked, up to date with apps but doesn't hold a call for longer than a minute! I'd rather not to be able to make a phone call at all. First, it didn't work unless I made a call on wifi calling only... now I can get network calls to work temporarily... it's like I am inching closer to the finish line.


how do I manually add Verizons apns to my settings?


yes I think I was just doing things out of order which was my mistake, but the truth is nothing would have really worked until I properly unlocked the phone the right way. now that I have confirmed my VZW LTE Bands are active, I have a new set of issues.

I've been having the "getting thrown off tower and then back on again" With US Mobile, but verizon direct works just fine.

 

[moogpunk]

I've opted not to return the phone and hope that either someone figures this out or I did something wrong because its a nice little device

this might be a stupid question but does Verizon consider this a dumb phone or smart phone when they see it on their network? or does it not matter? like, this doesn't require a data plan right? because the phone it's replacing is a sonim xp5 which does not have a data plan. is that why they are booting me?

 

[Potential_Threat]

If anyone knows how To flash the complete F30 Firmware(Including the locked down kosher parts) onto the F21? Would be greatly appreciated.
I've been told to flash the super partition, but when I did that, after turning the phone on, it booted into TWRP.

 

[amberumbrella]

Thank you for this! I got my phone in last night and got it working today!

Things of note:

In the rooting guide (I did the whole thing), I had to both:​

- Manually install a magisk apk I downloaded online​

- In the "how to root" section, I had to do part 1 of step 12 (magisk hide) out of order (after step 23 iirc)​

Once I figured out I had to do those, it went by much smoother. I recognize those aren't directly from your guide, but I know it can be helpful to others who will use your guide regardless.

Thanks again for sharing! Coming from a Palm PVG-100 to the Qin F21; I'm very excited to use this phone

 

[Pannette]

Questions for the people here: has anyone had any issues receiving MMS messages since making the switch? I haven't been able to download any when it was working just fine on my previous phone (Light Phone 2), but now I can't even download ones that are just long texts let alone images. I went to a Verizon store and asked them about it and they told me it was probably an issue with the fact that the device wasn't approved, but unless no one who's done this has received a single MMS message besides me, I imagine this is something on my end?

 

[nemoslumbers]

Questions for the people here: has anyone had any issues receiving MMS messages since making the switch? I haven't been able to download any when it was working just fine on my previous phone (Light Phone 2), but now I can't even download ones that are just long texts let alone images. I went to a Verizon store and asked them about it and they told me it was probably an issue with the fact that the device wasn't approved, but unless no one who's done this has received a single MMS message besides me, I imagine this is something on my end?

Are you just using Google Messages, or something else?

 

[Pannette]

Are you just using Google Messages, or something else?

I'm just using whatever the default messaging app is. Tried to switch to Google Messages briefly but realized that it wouldn't be quite as well laid out for the physical buttons like the default one is.

 

[Potential_Threat]

Fun Tip For this guide as well as the rooting and PlayStore guides:

• Try Using a USB 3.1 port from computer
• And a good Quality wire

I saw a world of difference doing so while using the rooting tool, SPFlash Tool & SNWriter tool.
While using a regular USB port and/or a low quality wire It would take way longer and sometimes made me have to rerun those programs.

 

[Potential_Threat]

If anyone could please help me Flash The full F30 firmware(meaning along with the kosher firmware) onto the F21 Would Be greatly appreciated.
It sounds like that was pretty easy to do and the only hard part was to only flash The Modem Partitions, Hence this guide, But I unfortunately couldn't figure it out, If I try flashing any F30 partitions other than the provided modem partitions, when powering on the phone it boots directly into TWRP instead of into android.
Any help would be greatly appreciated.

 

[boogie2325]

Hello and thank you for the tutorial.
I am stuck at the SN Writer tool after entering the IMEI, BT and WIFI mac addresses. No way that it pushes forward and shows the attached error. I have used different USB cables as well, OEM ones but still fails.
Also, after the error Qin f21 pro shows imei number as 012345678901234 and does not connect to T-mobile network. I have re-run the steps to no avail.
If anyone of you please guide me it will be awesome.

Thanks in advance.

 

[Sasa1991]

Just tested this guide.
I have both, the f21pro and the f30.
The process working well, and indeed the bands list showing the f30 bands, however I can't see any affect on the signal itself. I mean, the original f21pro also working partially on USA, because some bands are supported in USA, however the signal still same as it was before the process, unlike the f30, which have perfect signal
I think it's not really changing something, it's only changing the list from where the device getting the bands list. However the real bands coming probably from the hardware