Related
Good Morning,
After flashing the Gingerbread Baseband I no longer am able to register on the network for my provider.
The device is from Rogers but unlocked and being used on the Bell network.
After flashing I realized there may be a different baseband for me to use in Canada (just North of Toronto).
I require some help in locating a Gingerbread baseband that would work or provide me with instructions on how to return to the original baseband.
Any help is appreciated!
Thank you kindly,
- Audi2Audi
Did you set the APN manually? You have to do that.
Hello!
APN in Menu|Settings|Wireless & Networks|Mobile Networks|Access Point Names ?
I have set that to: pda.bell.ca
Is there other steps required though?
Thank you for the response!
apn settings is for internet. phone must tower of sim. may be flashing baseband again will soveit because i am tower getting for my country
If you're wanting to go back to stock froyo first you need to visit here to get your original rom... these will also flash the baseband back too
http://forum.xda-developers.com/showthread.php?t=1246678
or here http://forum.xda-developers.com/showthread.php?t=1155874
then you will need to follow this turtorial in order to flash the stock rom back on (go down to second post that one is in English )
http://forum.xda-developers.com/showthread.php?t=1244490
Although it is a possibility that the BB hasn't flashed correctly, might be worth trying it again... might also be worth trying a froyo rom to see if you get a signal then, because if you do you still have the froyo baseband on...
Simplier to flash stock baseband using kdz tutorial in my signature.
Edit:
But i'm not sure if rogers has the same firmware
adixtra said:
Simplier to flash stock baseband using kdz tutorial in my signature.
Edit:
But i'm not sure if rogers has the same firmware
Click to expand...
Click to collapse
Thanks adixtra i always forget about the tutorial of yours
You can flash a .Bin File for Your P920 or P920H.
Ok, now this is getting bizarre hah.
I reflashed the baseband again and everything went normal as it did before.
This time I searched for networks and selected my provider. After about 5 minutes of the device trying to register on the network an error was received that said it was unable to register on this network.
However, when I got to my home screen I was registered on the network. I tested a voice call and it worked. I have tested data as well.
BUT! This is where it gets even more bizarre...The device cycles from 4 signal bars to 2 signal bars to none to 3G (from H) followed by not being registered on the network. Then a few minutes later (sometimes only after a reboot) it returns to 4 bars and begins the cycle again.
Has anyone seen anything like this before?
Thank you again for your help!
Questions or Problems Should Not Be Posted in the Development Forum
Please Post in the Correct Forums and Read THIS
Moving to General
Yes i have seen this with my install of the baseband file but it will not let me register the 3g or 3g+ let keeps me on full with gsm only its why i flashed mine back using the lg update tool software i put it right back to stock using similar way you flashed the baseband file. PS im on rogers as well
teray0n said:
Yes i have seen this with my install of the baseband file but it will not let me register the 3g or 3g+ let keeps me on full with gsm only its why i flashed mine back using the lg update tool software i put it right back to stock using similar way you flashed the baseband file. PS im on rogers as well
Click to expand...
Click to collapse
Good Evening,
Would you be able to upload the KDZ file from your update?
I am having problems with the LG Phone Recovery indicating that I have the most up to date software and halting the recovery process.
Thank you!
- Audi2Audi
Hello,
I flashed an earlier KDZ which allowed me to use the LG Update tool to restore my stock rom.
Thank you everyone for your help and advice.
- Audi2Audi.
it will tell you that but if you use recovery mode and it will download the file then you will have to unplug the phone from usb hold vol+ power then plug it back into the usb and it should download. like i said i used similiar method to flashing baseband
On my windows 7 not detect omap 4 and i can't flash baseband,what can i do?
Good Afternoon everyone
I'm of average knowledge and have had an issue that im hoping you kind people can assist with. I will happily add more details if necessary but I'll try and keep it simple and clear for now for my current sitation and what I'm looking to do.
I've been happily using AOKP on my XT925 for a few months now and updating it every now and again. After an infinite bootloop issue last night, I was kind of buggered but after toing and froing I got into Fastboot. After not much and desperate to attempt was working I used Mr Parkinsons 2.0 tool, and with it listing flashing to stock XT925 / XT926 as its option 1, I clicked that. Successfully it flashed it with the package it uses and booted fine. I have functionality, on the phone settings strangely its now listing as XT926 but again it works HOWEVER unbeknowst (probably stupidly) to me its a VZW American default and naturally won't recognise my SIM and I can't make calls.
I'm currently trying to flash it again through Fastboot with RSD Lite 6.15 to a Stock Xt925 Firmware, ones I acquired through the thread in the XDA Dev. I'm based in the UK and my SIM / Network provider is O2. The nearest fit Firmware wise seems to be the Orange UK package or the Vodafone France ones.
The Orange UK package won't decompress in RSD as it's saying 'the filename may be too long'. The Vodafone France one will decompress - however originally it said 'unknown flashboot command - flash failed' (getvar). Having done some reading I deleted the sole line 'Getvar' string in the XML through notepad, saved it and tried again. This time is said something along the lines of 'Flash failed 2/22 - phone returned'. I've tried Googling this error and all the forums that mention it seem to be in Spanish or French.
I'm tired and it's been a long day for family issues - however I could do with having my phone back on an even keel. Please can someone help or at least point me in the right direction? I'd be very VERY grateful for any dialogue.
SHORT VERSION OF PROBLEM: Currently running the Stock Recovery Package included in Mr Parkinsons 2.0 utility. Phone is functional bar not recognising my SIM and Im in the UK on O2 and it's US centric. Concerned that in phone settings it says XT926. Recovery and fastboot options available. RSD Lite is returning primarily saying 'flash failed 2/22'
Are there any other utilities to recommend that would get me where I want to be other than RSD?
Please go easy on me! If I've not explained myself very well then and someone may know the answer then I'm happy to be more descriptive in terms of details
Additional details:
- On startup its saying 'SIM is from unrecognised source
- My current system version is 9.16.6.XT926.Verizon.en.US / Baseband: VANQUISH_BP_100730.081.64.09P
After some playing I resolved this.
In terms of anyone who should be faced with this issue, the answer lies in deleting more of the .xml file in your zip that your flashing via RSD
I browse this forum every now and again so reply if you need assitance and need me to be more specific, otherwise mods can lock this as closed.
Hello guys.
I have a xperia Z3 from VIVO and flashed a rom from OI, everything went well on flashing the rom but after it finished i noticed that i lost my 4G. When i search for network there have a TIM BRASIL LTE but it won't let me register on it.
Do anyone know how to solve that?
Thanks!
Input the correct apn settings from your carrier
LitoNi said:
Input the correct apn settings from your carrier
Click to expand...
Click to collapse
Lito, do you think that would help?
Because the problem is that I am not able to register to the LTE network, it's not related to the ability of using internet.
Actually, this is exactly what happens, after i flash the firmware i have 4G but after a few minutes (Between 5 and 10 minutes) i completelly lose connection to the LTE network, even if it's available in the networks list.
Info
DiegoManBR said:
Lito, do you think that would help?
Because the problem is that I am not able to register to the LTE network, it's not related to the ability of using internet.
Actually, this is exactly what happens, after i flash the firmware i have 4G but after a few minutes (Between 5 and 10 minutes) i completelly lose connection to the LTE network, even if it's available in the networks list.
Click to expand...
Click to collapse
just test firmware of another region
(UK firmware for example)
:good:
DiegoManBR said:
Lito, do you think that would help?
Because the problem is that I am not able to register to the LTE network, it's not related to the ability of using internet.
Actually, this is exactly what happens, after i flash the firmware i have 4G but after a few minutes (Between 5 and 10 minutes) i completelly lose connection to the LTE network, even if it's available in the networks list.
Click to expand...
Click to collapse
Maybe if you explained a bit better that would?
Like mentioned before this post, try to flash only the baseband from another region, hopefully that will solve it.
Geeks Empire said:
just test firmware of another region
(UK firmware for example)
:good:
Click to expand...
Click to collapse
Geeks, there have no other region for my version of the Z3, also i am trying to flash many other rooms from my region and all of them results in a error during the flash... Blank error, no description.
LitoNi said:
Maybe if you explained a bit better that would?
Like mentioned before this post, try to flash only the baseband from another region, hopefully that will solve it.
Click to expand...
Click to collapse
Lito, thanks for the sugestion, i flashed the baseband for the Customized PT and after flash i got the 4G signal for about 30 minutes, but when i rebooted the phone, i completelly lost 4G again, and now in the network lists there is no LTE from TIM. Could it be because i installed an european baseband on a mobile here in brazil?
Thanks agian.
DiegoManBR said:
Lito, thanks for the sugestion, i flashed the baseband for the Customized PT and after flash i got the 4G signal for about 30 minutes, but when i rebooted the phone, i completelly lost 4G again, and now in the network lists there is no LTE from TIM. Could it be because i installed an european baseband on a mobile here in brazil?
Thanks agian.
Click to expand...
Click to collapse
thats weird... are you sure you have the correct APN settings inputted? Also, i would assume youve tried flashing the VIVO's baseband or any other USA roms?
Try the following if you have already done all those: go to dial pad and input *#*#4636#*#* > phone info > menu top right > select radio band > try Australia or USA or what ever pops up > scroll down and make sure LTE/GSM auto is selected or try out the other ones > scroll back up and hit the "run ping test"
if all these doesnt work, i would advise you to go back to the original rom.
just curious, which model number is your Z3?
LitoNi said:
thats weird... are you sure you have the correct APN settings inputted? Also, i would assume youve tried flashing the VIVO's baseband or any other USA roms?
Try the following if you have already done all those: go to dial pad and input *#*#4636#*#* > phone info > menu top right > select radio band > try Australia or USA or what ever pops up > scroll down and make sure LTE/GSM auto is selected or try out the other ones > scroll back up and hit the "run ping test"
if all these doesnt work, i would advise you to go back to the original rom.
just curious, which model number is your Z3?
Click to expand...
Click to collapse
Lito, now i will complicate a little bit more then. First, the model number of my mobile is D6646 from Brazil with DTV.
Also, i tried to flash the Vivo Baseband and it was worse, i did not install any baseband from USA, just from Portugal.
I tried that on the keyboard, but when i chose USA band i just can't even register on any TIM network.
Also, i tried to flash the original rom, but i can't flash any other firmware apart from Oi. I get a blank error line on flashtool for every other rom i tried to install, so it's even worse
Feel the challenge.
Thanks again for all your help.
flash back to the original ROM if you can, also, how did you flash to the new rom? through recovery or Flashtool? if you see a blank space or what ever, you might not have the correct drivers installed on your computer, especially if youre running Windows 8.
that being said, i dont see D6646 in Xperifirm, i cant tell you what to flash and what not to flash. Without that, i wouldnt advise you to flash anything but the original rom that it came with, you dont want to soft/hard brick the device.
LitoNi said:
flash back to the original ROM if you can, also, how did you flash to the new rom? through recovery or Flashtool? if you see a blank space or what ever, you might not have the correct drivers installed on your computer, especially if youre running Windows 8.
that being said, i dont see D6646 in Xperifirm, i cant tell you what to flash and what not to flash. Without that, i wouldnt advise you to flash anything but the original rom that it came with, you dont want to soft/hard brick the device.
Click to expand...
Click to collapse
Lito, I tryied to flash the original room, I am using XperiaFirm to download the firmware and flashtool to flash. I can flash the Oi room, but i can't flash the vivo BR, the Claro Argentina, or the Customized PT, all of them results in a blank error, it's not drivers problems, since i can install the Oi firmware and also i disabled the signature on windows in order to install.
Anyway, i solved the problem in order to show another problem. Here is the situation:
I created another APN to use when i don't want to use internet because even with data package disabled my mobile send data to the carrier that charges me, when i deleted that APN the 4G worked perfectly, but now my carrier is charging me the data . Any idea how to block this data comsumption?
Thanks again.
DiegoManBR said:
Lito, I tryied to flash the original room, I am using XperiaFirm to download the firmware and flashtool to flash. I can flash the Oi room, but i can't flash the vivo BR, the Claro Argentina, or the Customized PT, all of them results in a blank error, it's not drivers problems, since i can install the Oi firmware and also i disabled the signature on windows in order to install.
Anyway, i solved the problem in order to show another problem. Here is the situation:
I created another APN to use when i don't want to use internet because even with data package disabled my mobile send data to the carrier that charges me, when i deleted that APN the 4G worked perfectly, but now my carrier is charging me the data . Any idea how to block this data comsumption?
Thanks again.
Click to expand...
Click to collapse
that is extremely weird, never had such issues with any of my android phones. make sure data roaming is not on, the carrier shouldnt be able to charge you if you disabled data
Also, make sure the FTF files youve made with xperifirm and flashtool are correct, like not including the TA files etc..., i would advise you redownload those FTF files and try again, also make sure you have the latest flashtool available.
at this point, you are probably better seeking for a developer or someone who can read codes, make a logcat and see if the flashtool thread is available and ask there. Aside from the FTF files, you are better off asking the carrier why they are still able to charge you in such way. Sorry man, this is as far I can aid you in this matter. GL bud!
Help I have a 702 model of this phone. I have T-Mobile and cannot connect to h+ or 3g only 2g works but what's strange is that when you make a call and remain on the line the h+ will work and its fast. If anyone can help or suggest of maybe give me there APN setting I would appreciate it. I don't see what I'm doing wrong everything is good. Also I did try and search and search for a answer but all I can find is the question being asked but never a answer. Thanks a lot.
bosnia8659 said:
Help I have a 702 model of this phone. I have T-Mobile and cannot connect to h+ or 3g only 2g works but what's strange is that when you make a call and remain on the line the h+ will work and its fast. If anyone can help or suggest of maybe give me there APN setting I would appreciate it. I don't see what I'm doing wrong everything is good. Also I did try and search and search for a answer but all I can find is the question being asked but never a answer. Thanks a lot.
Click to expand...
Click to collapse
Your SIM should have automatically put in your APN settings. Send me a screenshot of your Mobile Network screen in Settings.
Phone won't let me upload. But if you can give your input on APN it would be great. I know mine are right I have fast T-Mobile and also epc T-Mobile. . if you let me know how to upload the pics I'll be more than happy to. Thanks. I don't understand. 2 gworks. But 4g 3g h,,+ only works when I'm litteraly on the phone. Best way to say it is to make a call and answer the line put phone in munte and use the net. Just strange.
bosnia8659 said:
Phone won't let me upload. But if you can give your input on APN it would be great. I know mine are right I have fast T-Mobile and also epc T-Mobile. . if you let me know how to upload the pics I'll be more than happy to. Thanks. I don't understand. 2 gworks. But 4g 3g h,,+ only works when I'm litteraly on the phone. Best way to say it is to make a call and answer the line put phone in munte and use the net. Just strange.
Click to expand...
Click to collapse
Any advice or a screen shot of APN will be greatly appreciated. Thanks
Did you find apn?
Hi,
I have same device and am running into no data issue too. Did you ever get the apn?
Robbie
On my 702L with T-Mobile I had to go into Settings--->More--->Mobile Network and set the Preferred network type to WCDMA only (for some reason.) Then I had HSPA+.
No WCDMA
ajsmsg78 said:
On my 702L with T-Mobile I had to go into Settings--->More--->Mobile Network and set the Preferred network type to WCDMA only (for some reason.) Then I had HSPA+.
Click to expand...
Click to collapse
Hi,
Thanks for taking time to respond. Did you do any additional steps to activate additional preferred network types? I have 4g, 3g, 2g, 4g/3g/2g auto, and automatic (3g/2g). Rob
AzRob82 said:
Hi,
Thanks for taking time to respond. Did you do any additional steps to activate additional preferred network types? I have 4g, 3g, 2g, 4g/3g/2g auto, and automatic (3g/2g). Rob
Click to expand...
Click to collapse
The only thing I can think of is I flashed the B111 cust mod.
ajsmsg78 said:
The only thing I can think of is I flashed the B111 cust mod.
Click to expand...
Click to collapse
Is yours the 702l? I love the device but had planned on returning tomorrow since I couldn't get it going. I will root and flash rom if yours is the 702l. Would hate to do all that if I have different model.
AzRob82 said:
Is yours the 702l? I love the device but had planned on returning tomorrow since I couldn't get it going. I will root and flash rom if yours is the 702l. Would hate to do all that if I have different model.
Click to expand...
Click to collapse
Yeah it's a 702L. This is what I have in mobile networks. On my 703L I only have 3 options. (4G/3G/2G Auto, 3G/2G Auto and 2G only)
ajsmsg78 said:
Yeah it's a 702L. This is what I have in mobile networks. On my 703L I only have 3 options. (4G/3G/2G Auto, 3G/2G Auto and 2G only)
Click to expand...
Click to collapse
Sorry if this is wrong place to post this question I was unable to in your thread [RECOVERY] [5.1.1] TWRP for Mediapad X2 **UPDATE 12/5/15**.
I have 702L with B006. When I run "fastboot flash recovery twrp_cn.img" from the cmnd prompt I opened in the folder located on desktop with twrp I get an error message 'fastboot' is not recognized as an internal or external command, operable program or batch file. The twrp file is named twrp-eng-5.1.1 I tried "fastboot flash recovery twrp-eng-5.1.1.img" and receive the same message. Any help would be appreciated. I have been trying since you answered my first questions. I am a novice I have successfully rooted several phones in the past by following the XDA instructions.
Forgot to mention I did unlock bootloader or at least I think I did. Fastboot screen shows phone unlocked now.
AzRob82 said:
Sorry if this is wrong place to post this question I was unable to in your thread [RECOVERY] [5.1.1] TWRP for Mediapad X2 **UPDATE 12/5/15**.
I have 702L with B006. When I run "fastboot flash recovery twrp_cn.img" from the cmnd prompt I opened in the folder located on desktop with twrp I get an error message 'fastboot' is not recognized as an internal or external command, operable program or batch file. The twrp file is named twrp-eng-5.1.1 I tried "fastboot flash recovery twrp-eng-5.1.1.img" and receive the same message. Any help would be appreciated. I have been trying since you answered my first questions. I am a novice I have successfully rooted several phones in the past by following the XDA instructions.
Forgot to mention I did unlock bootloader or at least I think I did. Fastboot screen shows phone unlocked now.
Click to expand...
Click to collapse
Do you have the Andoid Tools in the same folder as the TWRP File? Download this and extract it to your desktop and put the TWRP file in with the extracted folder then it should work.
https://docviewer.yandex.com/?url=ya-disk-public%3A%2F%2FvI5Y3Obeku4qzIrtHfPviJPL3yhTpSABBi9V4fM0UpU%3D%3A%2Fadb%2Bfastboot%2Fplatform-tools.zip&name=platform-tools.zip&c=5688b1f6cdb7
new error
Thanks for getting back to me. I didn't realize they had to be in the same folder. I am getting a new message now:
target reported max download size of 471059200 bytes
sending 'recovery'...
FAILED <remote: Command not allowed>
finished. total time : 0.899s
When I unlocked bootloader is said something like status bootloader unlocked. it does show phone unlocked in fastboot. Not sure if i need to go through steps again to unlock bootloader.
AzRob82 said:
Thanks for getting back to me. I didn't realize they had to be in the same folder. I am getting a new message now:
target reported max download size of 471059200 bytes
sending 'recovery'...
FAILED <remote: Command not allowed>
finished. total time : 0.899s
When I unlocked bootloader is said something like status bootloader unlocked. it does show phone unlocked in fastboot. Not sure if i need to go through steps again to unlock bootloader.
Click to expand...
Click to collapse
Yeah unlock it again, sometimes this happens and it says it's unlocked when it isn't.
still at it.
ajsmsg78 said:
Yeah unlock it again, sometimes this happens and it says it's unlocked when it isn't.
Click to expand...
Click to collapse
I am stuck in a boot loop of the hauwei logo when I hold volume up and power. If phone is plugged into pc it goes to stock recovery. I received confirmation that twrp installed from cmd. I tried to download the twrp img again and go through steps before writing you but I get a message error cannot load twrp-eng-5.1.1.img. I cant thank you enough for trying to help me. I plan to formally "thank you" once I get this going. Do you have any suggestions?
AzRob82 said:
I am stuck in a boot loop of the hauwei logo when I hold volume up and power. If phone is plugged into pc it goes to stock recovery. I received confirmation that twrp installed from cmd. I tried to download the twrp img again and go through steps before writing you but I get a message error cannot load twrp-eng-5.1.1.img. I cant thank you enough for trying to help me. I plan to formally "thank you" once I get this going. Do you have any suggestions?
Click to expand...
Click to collapse
Hold in volume down and power when the phone is plugged into the computer to get into fastboot, then you can do a fastboot oem unlock xxxxxxxxxxxxxx. Then boot into fastboot again and flash TWRP. Download the first TWRP if your're already on Android 5.1.1. If not you need do download the one for Android 5.0 from the 2nd link. I think you said you were on B006 so you need to use the TWRP for Android 5.0. When you get to B106 then flash and use the TWRP for 5.1.1.
5.1.1: https://drive.google.com/file/d/0B5I_q70mNuR4Uy1XdXVoSG1SMXc/view
5.0: https://drive.google.com/file/d/0B5I_q70mNuR4R0hHNzRRVXhlQWs/view
still at it
ajsmsg78 said:
Hold in volume down and power when the phone is plugged into the computer to get into fastboot, then you can do a fastboot oem unlock xxxxxxxxxxxxxx. Then boot into fastboot again and flash TWRP. Download the first TWRP if your're already on Android 5.1.1. If not you need do download the one for Android 5.0 from the 2nd link. I think you said you were on B006 so you need to use the TWRP for Android 5.0. When you get to B106 then flash and use the TWRP for 5.1.1.
Thanks for all your help. I am at a loss. I think I just purchased an expensive wifi only tab now that makes calls. I successfully rooted and flashed your CUST MOD B111. I still dont have WCDMA as an option. I am unsure with root access if there is an app or file that will force WCDMA.
I updated my apn settings again per tmobile website. I am able to make calls and can use internet only when on a phone call. if you know of any other options I would really appreciate it.
Click to expand...
Click to collapse
AzRob82 said:
ajsmsg78 said:
Hold in volume down and power when the phone is plugged into the computer to get into fastboot, then you can do a fastboot oem unlock xxxxxxxxxxxxxx. Then boot into fastboot again and flash TWRP. Download the first TWRP if your're already on Android 5.1.1. If not you need do download the one for Android 5.0 from the 2nd link. I think you said you were on B006 so you need to use the TWRP for Android 5.0. When you get to B106 then flash and use the TWRP for 5.1.1.
Thanks for all your help. I am at a loss. I think I just purchased an expensive wifi only tab now that makes calls. I successfully rooted and flashed your CUST MOD B111. I still dont have WCDMA as an option. I am unsure with root access if there is an app or file that will force WCDMA.
I updated my apn settings again per tmobile website. I am able to make calls and can use internet only when on a phone call. if you know of any other options I would really appreciate it.
Click to expand...
Click to collapse
What options do you have? What cell service are you using?
Click to expand...
Click to collapse
I have tmobile with data plan. I am using my note 4 at this time without a problem. I have tried several family members sim cards and went to tmobile to get a new sim card. Only get Internet if I am on a call. It's really weird. I would think it is some setting.
Hi ajsmsg78, I gave up on device for awhile and started messing with it again. After doing a factory reset I have all the preferred network connections you have. The only one that allows me to get internet when I am not on a phone call is GSM which only gives me 2g. I tried WCDMA and internet will not work. Would flashing a different rom possibly help?
Hello guys,
As I have stated on my Q&A thread I was going to be posting a tutorial in order to bring LTE back for those who had lost it. I will give you some background in order for you to know how I lost it and then I will explain how did I get it back:
How did I lost it:
I had bought a Xiaomi Mi A1, and had given my previous Redmi Note 5 SD636 to my wife, for reasons that don't care at this time haha. So, I get it and I am on carrier Tigo Colombia, which uses band 4 AWS-1 . Everything was working as expected, I had my 4G LTE as a regular user. I had installed the gcam, unlocking bootloader and then relocking it, flawless. Everything was working perfect.
The issue came, when I decided that was time to try one of the AOSP Pie roms. I decided to try Simplix Blue, which called my attention due to not being available on RN5 the device that I used to own. I am pretty sure, that has nothing to do with the rom, for reasons that I will explain later on, but more fault of the SD625, boot.img and modem of the device. So I flashed the rom, as I usually do, following instructions, installing TWRP, changing slot, bla bla bla.. you already know this. So I booted up the rom, and it was on 3g, seemed strange, but on the initial set up I thought myself it was more of configuration on the network side. So, as soon as I finished the set up, I went into settings and selected LTE/WCDMA, did not work. Selected only LTE, did not work. Dialed #*#*4636*#*#, choose LTE network, did not work. So I said, this is more of a ROM problem then. Installed Arrow OS, same issue. Started getting strange, so I said, maybe it is a stock rom problem on my device, so I downloaded Stock ROM and flashed. Surprisingly, did not work either.
So I started to look around for solutions, wrote on telegram group and got ignored, as usually happens on that group, and I posted a Q&A thread here, which you can find here:
https://forum.xda-developers.com/mi-a1/help/lost-lte-pie-t3852725
Got no response at first, and then I saw some similar threads with same issue but no resolution. So I started looking for myself. Lasted 2 days looking for a solution as I was completely sure it was not a Hardware issue as I had it before. So, I will explain how I get it back after combining a tutorial with some personal knowledge.
I need to give credits to: @kirtikhurana, he does not even know I used his tutorial for Lenovo P2 haha, but it is worth it thanking him as his thread helped me a lot.
What we need:
QPST
QXDM (You can find this two programs on this thread, 3rd post https://forum.xda-developers.com/lenovo-p2/how-to/enabled-4g-ca-p2-t3707584) Once again, thanks to the creator of the thread for this.
Minimal ADB and Fastboot
LTE Band Calulator app(Which you can find on play store)
Network signal guru app (Which you can find on play store too)
Stock rom (Then you can change it and flash whatever rom you want)
First thing, is have the stock rom rooted, with magisk or whatever method you choose to root it. We will connect the phone to our PC and turn on the USB debugging. For the ADB and fastboot, let's make sure we open the CMD with administrator rights.
I will assume you had already installed QPST and QXDM. We will open a CMD where we have ADB and Fastboot and type:
Code:
adb shell
and then:
Code:
su
We will grant adb shell superuser rights on our phone. As soon as superuser rights are granted, we need to enter on DIAG mode, for that, we will type on the CMD:
Code:
setprop sys.usb.config rndis,diag,adb
On the original thread, it is stated that you can also dial *#*#717717#*#* to enter directly in diagnostic mode (Use this option if QPST does not detect your phone on following steps and reboot).
Now, we will go to QPST>bin folder and open QPST Config, with administrator rights. Check whether your phone is connected or not on diagnostic mode. I will clarify something here:
On the second tab of the QPST Config, you will see an option to add ports, by default, you can select COM1, which is usually not the port where we connect the USB. If that happens and does not detect your device, go to device administrator in the control panel, and make sure your android phone is detected as Diagnostic device, you can check that on USB and ports, where you will also find COM1 as another device. As soon as you make sure drivers and everything is ok, but still does not detect the phone, do the step previously mentioned of: *#*#717717#*#* and reboot.
Now, assuming that your phone is showing there, you will now go to QXDM>bin and open on the tools bar, options and click on communications: You will see your device and the type of model of the processor, in this case, should be MSM8986 or similar. Check below and you will see an option called target port, check on drop down list and choose the com port where you have your device. Now you can close that window.
Now, we will go to view and pick NV Browser, then look for the filter LTE. Then we will select the first option (if this and the other option if grayed out means it has not taken the connection of your phone).
On that first option, you will see two fields below. We will choose the first one and click on read. As soon as we do that, it will autopopulate a number, that number are the bands that you have enabled.
Let's go now to our phone and open LTE band calculator, and let's pick up the bands we need to have (if you write a random number on the app, it will show you which bands will be selected with that number).
Having that number, we will, in QXDM, double click on the input field and write the number that the app has given us and then click on write. As soon as we do that, we need to reboot the phone.
Now, when the phone is already rebooted, we will open network signal guru, provide corresponding permissions and now, click on the three dots at the top right corner and click on lock bands, select LTE. Now, you will see that the band that you were missing, for you to get LTE is there! So what you need to do is select it and click accept. Your phone will freeze for a bit and then reboot itself.
As soon as the phone is rebooted, you will see that you have your LTE back!!
This was the way I was able to get it.
I said it was not a rom, because if you flash stock rom again, with miFlash, you may loose LTE again and need to repeat the process as it happened to me. However, if you are on stock and decide to flash another rom, oreo or pie, you will not lose it.
Hopefully is clear enough for you guys who are facing this issue.
Regards
I lost also band 20 after flashing LOS and after that latest stock
So if i install LOS 15.1 after this method, band 20 will stay unlocked?
Thanks
trance89 said:
I lost also band 20 after flashing LOS and after that latest stock
So if i install LOS 15.1 after this method, band 20 will stay unlocked?
Thanks
Click to expand...
Click to collapse
Yes sir it will! You can do it with no issues whatsoever.
And if i root my system with patched boot.img + magisk method and after this mod i just revert back the untouched boot.img then can i relock bootloader?
ota updates or factory reset won't destroy it?
Thank you
trance89 said:
And if i root my system with patched boot.img + magisk method and after this mod i just revert back the untouched boot.img then can i relock bootloader?
ota updates or factory reset won't destroy it?
Thank you
Click to expand...
Click to collapse
You can do all your stuff. Only thing is if you flash again via MiFlash stock rom, then it may break and you may need to redo the process. But besides that, you can root, unroot, install custom, everything you want to do and you will not loose your band.
Please help! I can't seem to get the device into diagnostic mode or the damn windows drivers don't work. I've installed minimal ADB and drivers from xiaomi. as soon as I enter setprop sys.usb.config rndis,diag,adb no vibrate or anything on my device and in my windows device manager the Android device changes to an ADB interface and a Android device with a yellow exclamation mark. Dialing *#*#717717#*#* doesn't do a thing. I'm on LOS 15.1. Of course no com1 ports to connect to Any ideas?
saski4711 said:
Please help! I can't seem to get the device into diagnostic mode or the damn windows drivers don't work. I've installed minimal ADB and drivers from xiaomi. as soon as I enter setprop sys.usb.config rndis,diag,adb no vibrate or anything on my device and in my windows device manager the Android device changes to an ADB interface and a Android device with a yellow exclamation mark. Dialing *#*#717717#*#* doesn't do a thing. I'm on LOS 15.1. Of course no com1 ports to connect to Any ideas?
Click to expand...
Click to collapse
use google usb driver, it works with all devices: https://developer.android.com/studio/run/win-usb
Jemec26 thanks for the step by step instructions, i got back my lost band
saski4711 said:
Please help! I can't seem to get the device into diagnostic mode or the damn windows drivers don't work. I've installed minimal ADB and drivers from xiaomi. as soon as I enter setprop sys.usb.config rndis,diag,adb no vibrate or anything on my device and in my windows device manager the Android device changes to an ADB interface and a Android device with a yellow exclamation mark. Dialing *#*#717717#*#* doesn't do a thing. I'm on LOS 15.1. Of course no com1 ports to connect to Any ideas?
Click to expand...
Click to collapse
Go with stock rom first. It is not mandatory, but on other roms it may not work.
trance89 said:
use google usb driver, it works with all devices: https://developer.android.com/studio/run/win-usb
Jemec26 thanks for the step by step instructions, i got back my lost band
Click to expand...
Click to collapse
Glad it helped you!
saski4711 said:
Please help! I can't seem to get the device into diagnostic mode or the damn windows drivers don't work. I've installed minimal ADB and drivers from xiaomi. as soon as I enter setprop sys.usb.config rndis,diag,adb no vibrate or anything on my device and in my windows device manager the Android device changes to an ADB interface and a Android device with a yellow exclamation mark. Dialing *#*#717717#*#* doesn't do a thing. I'm on LOS 15.1. Of course no com1 ports to connect to Any ideas?
Click to expand...
Click to collapse
to make use of qualcomm diagnostic mode you must use qualcomm driver, take a look here https://forum.xda-developers.com/mi-a1/how-to/tool-low-level-backup-restore-unbrick-t3790307 in faqs section.
and here an explanation https://forum.hovatek.com/thread-22399.html
Main branch of los and aosp has network issue it needs to be fixed from scratch.
Ok finally I've managed to work through this and it now shows that band 20 is finally back enabled! However there is still no LTE band 20 reception (only band 3 in the city) and yes LTE band 20 signal strength is good when checking with other devices.
Anyway thanks so much for this tutorial but I guess my MiA1 is defective or bricked beyond repair. ;(
saski4711 said:
Ok finally I've managed to work through this and it now shows that band 20 is finally back enabled! However there is still no LTE band 20 reception (only band 3 in the city) and yes LTE band 20 signal strength is good when checking with other devices.
Anyway thanks so much for this tutorial but I guess my MiA1 is defective or bricked beyond repair. ;(
Click to expand...
Click to collapse
Weird. Please upload a pic when you can of the lock bands on the network signal guru app. Also, check with the *#*#4636#*#* the network mode that you are currently running. If your band 20 is already enabled, you should get it. Have you tried different sim?
Jemec26 said:
Weird. Please upload a pic when you can of the lock bands on the network signal guru app. Also, check with the *#*#4636#*#* the network mode that you are currently running. If your band 20 is already enabled, you should get it. Have you tried different sim?
Click to expand...
Click to collapse
Can't upload a screenshot since I'm at work now. LTE discovery shows only Band 3 LTE in the city and no LTE at all only 2G/3G in rural areas (where LTE Band 20 is availble!). Already switched SIMs they work fine (Telefonica Germany).
Signal Guru shows the following locked LTE bands:
B1:2100
B3:1800+
B5:850
B7:2600
B8:900 GSM
B20: 800DD (this one is new since I've unlocked it!)
B34: TDD 2000
B38: TDD 2600
B39: TDD 1900+
B40 TDD 2300
#*#*4636#*#* Shows Radio Band Automatic. Will Check all my steps again. could it be that I need to disable some bands in order to get band 20 working? Got my hand on a working MiA1 and it shows less LTE bands than the faulty one.
saski4711 said:
Can't upload a screenshot since I'm at work now. LTE discovery shows only Band 3 LTE in the city and no LTE at all only 2G/3G in rural areas (where LTE Band 20 is availble!). Already switched SIMs they work fine (Telefonica Germany).
Signal Guru shows the following locked LTE bands:
B1:2100
B3:1800+
B5:850
B7:2600
B8:900 GSM
B20: 800DD (this one is new since I've unlocked it!)
B34: TDD 2000
B38: TDD 2600
B39: TDD 1900+
B40 TDD 2300
#*#*4636#*#* Shows Radio Band Automatic. Will Check all my steps again. could it be that I need to disable some bands in order to get band 20 working? Got my hand on a working MiA1 and it shows less LTE bands than the faulty one.
Click to expand...
Click to collapse
Hmm I did not have to disable other bands but you can try and let us know, it won't damage anything and you can always make a backup. Try disabling bands that you know are not in use.
Tried everything disabled bands - nothing helped. Last Idea was to use the low level backup tool https://forum.xda-developers.com/mi-a1/how-to/tool-low-level-backup-restore-unbrick-t3790307 to backup all partitions from a functioning device with LOS installed and restore it to the one with LTE issues. Now the IMEI is gone. Reflashed August 2017 ROM with miflash to get the damn thing into diagnostic mode again (doesn't that work with LOS?) restored my IMEI, triggered OTA and got a boot loop. I'm afraid I've bricked my device beyond repair
update: I cannot mount my system_a partition in TWRP anymore. flashing stock fails with:
target reported max download size of 536870912 bytes
sending sparse 'system_a' (516697 KB)...
FAILED (data transfer failure (Too many links))
finished. total time: 4.295s
"Flash system_a error"
Any ideas? system_a cannot be 516697 KB in size no way!
saski4711 said:
Tried everything disabled bands - nothing helped. Last Idea was to use the low level backup tool https://forum.xda-developers.com/mi-a1/how-to/tool-low-level-backup-restore-unbrick-t3790307 to backup all partitions from a functioning device with LOS installed and restore it to the one with LTE issues. Now the IMEI is gone. Reflashed August 2017 ROM with miflash to get the damn thing into diagnostic mode again (doesn't that work with LOS?) restored my IMEI, triggered OTA and got a boot loop. I'm afraid I've bricked my device beyond repair
update: I cannot mount my system_a partition in TWRP anymore. flashing stock fails with:
target reported max download size of 536870912 bytes
sending sparse 'system_a' (516697 KB)...
FAILED (data transfer failure (Too many links))
finished. total time: 4.295s
"Flash system_a error"
Any ideas? system_a cannot be 516697 KB in size no way!
Click to expand...
Click to collapse
Whoa bro. I stated on the thread that you need to have stock rom. LOS may not work, after that you could install it. Now, for the prob that you have, try downloading a different image, try to even downgrade it to 7 and see if it works to restore partitions. I would suggest july firmware, some of the fw are not full, some do not even touch partitions, I know that july does, reason why I am suggesting it
Will this work for this problem? https://forum.xda-developers.com/mi-a1/help/4g-update-to-pie-t3877027 It's quite similar.... but with stock beta pie....
arc4d14n said:
Will this work for this problem? https://forum.xda-developers.com/mi-a1/help/4g-update-to-pie-t3877027 It's quite similar.... but with stock beta pie....
Click to expand...
Click to collapse
Yes, it will work. But i suggest you to wait the official fix.
jack_21 said:
Yes, it will work. But i suggest you to wait the official fix.
Click to expand...
Click to collapse
Thank you, I'll wait for a couple of patches before trying this, I just wanted to now all the alternatives