Database Users

[Q] Xiaomi Mi2s - No cell signal after IMEI restore.

Hi.
I have a Xiaomi Mi2S that doesn't connect to any cell networks.
I'm using CyanogenMod 11 nightlies, and after an update the phone lost its IMEI number. I had taken a backup of the NVRAM using EFS Professional, but when I looked for it the files where 0 bytes in length (probably a hard disk problem on my computer)
After trying a lot of stuff (installing stock MIUI, putting the phone in diag mode and installing a bunch of drivers), I managed to restore the IMEI number, but the phone still can't connect to the network.
I have tried a SIM from another company and it doesn't work. And my SIM works correctly in other phones, so I think that is not a SIM problem.
I don't know what to do... I tried flashing different ROMS, tried flashing a new baseband radio, but I can't get it to work! Is the phone lost???
Can anyone help me? I would appreciate it very much!!!!:crying:

vikingo_loco said:
Hi.
I have a Xiaomi Mi2S that doesn't connect to any cell networks.
I'm using CyanogenMod 11 nightlies, and after an update the phone lost its IMEI number. I had taken a backup of the NVRAM using EFS Professional, but when I looked for it the files where 0 bytes in length (probably a hard disk problem on my computer)
After trying a lot of stuff (installing stock MIUI, putting the phone in diag mode and installing a bunch of drivers), I managed to restore the IMEI number, but the phone still can't connect to the network.
I have tried a SIM from another company and it doesn't work. And my SIM works correctly in other phones, so I think that is not a SIM problem.
I don't know what to do... I tried flashing different ROMS, tried flashing a new baseband radio, but I can't get it to work! Is the phone lost???
Can anyone help me? I would appreciate it very much!!!!:crying:
Click to expand...
Click to collapse
Hello,
did you have some informations ? I have the same issue with my MI4... No more network after a flash of CM12... I hope you found a solution.
thanks.

[Q] SM-N900 Null IMEI - Please Help

Hello!
I have a Galaxy Note 3 SM-N900 that I got from a friend. When my friend gave it to me he still had all his stuff on it so I did a factory reset on the phone. After I reset it the phone had a null IMEI and an unknown baseband. I'm pretty sure the problem is with the modem as I've flashed the stock firmware on the phone several times, I've tried almost all the custom roms on the phone, I've even flashed a whole boatload of different modems.
One of the times I was at school I pulled out my phone to change my music and I noticed it had signal. The phone had signal in different parts of the school and it also had a working IMEI and a baseband. I called 911 to test if the phone worked and the call went through as if the phone never had an issue to begin with. I haven't been able to get any signal on the phone since then. I don't know what else to do and I was hoping someone could help me here! Thanks in advance for those who try to help me!

IMEI Standard answer is to restore your backed up EFS folder as per the faqs and guides .
You may well have a lose connection/ sim within the phone if its intermittent on .

Sadly I don't have a backup of my EFS. I had reset my phone from the settings menu so I didn't think that would cause any problems. Is there anyway I can get a backup of an EFS for the sm-n900 or are there any other solutions?

Is there anyway I can get a backup of an EFS for the sm-n90
NO
You could try flashing a stock lollipop firmware .

Again, I've tried that multiple times already. My EFS folder should be fine if I got signal randomly. My sim contact isn't loose as when I got signal I didn't have a sim in the phone. I think the problem is my modem but if it is I don't even know which modem to use.

Modem for your location/ network .

How do I find the correct modem? I live in the US and my network is MetroPCS
Also, thank you for trying to help me. I honestly appreciate it.

Please help me anyone!

4G networks undetected after IMEI recovery/custom ROM flash (HM2014819)

Hi
Last june I finally got my new Redmi 2 Pro (HM2014819, ergo the Brazilian version) and as soon as it arrived, I decided to reflash it into the latest available Nexus Experience custom ROM. Before that, though, I managed to check that my phone did had access even to LTE networks.
Turns out the GPS got weird because I supposedly didn't attempt to fix it before in the original ROM. I tried the the modemst1/2 format trick and it also didn't work. So I flashed MIUI7 over it again in an attempt to get a fix in the original ROM.
When I got back to MIUI, all celular/signal data was gone, along with my IMEI number (probably from the modemst partition wipe). I had to struggle a lot and I finally was able to recover it using this tutorial. However, as I just noticed recently playing Pokemon Go, 4G networks never came back even though I'm up and running on both H and H+ networks.
Using QPST and QXDM, I delve further into the QCN file and I could notice that the LTE values were actually set for Redmi2 PRIME version, which are Asia-related basebands 3 and 40 (meaning the actual LTE value in binary had 1's in the 3th and 40th bytes). However, the Redmi2 PRO version supports South America-related LTE bands 2, 4 and 7, as GSMArena points out.
Using this information and following this guide, I also tried to change/write over new Decimal values that would match my required LTE bands, but to no avail. When manually selecting networks, only 3G networks show up, even though I'm sure I could see and even pick 4G networks manually when I first booted up my (at that time, unmodified) new Redmi2.
What did just happen? What CAN I do?! How can I recover the intended, factory original version of the brazilian Redmi 2 networks?! Is there something to do with modemst2 erasure, or IMEI loss, or even NON-HLOS.bin file? Aren't they all overwritten when you reflash MIUI through MiFlash anyway?
Please, PLEASE, help me! I'm already on the brink of purchasing another cellphone (and it won't be another Xiaomi, that's for sure) if I can't get this to work. I did purchase this sorely because of the 4G connection and now I lost it entirely. Come on! :crying:

damn.... i've done this mess of erasing modemst's too and got the same problem. VERY LUCKY of me, i had a twrp backup that i did some days before doing this. hope you find some solution to this and dont give up on xiaomi just for a mess that you did xD

igorinolw said:
damn.... i've done this mess of erasing modemst's too and got the same problem. VERY LUCKY of me, i had a twrp backup that i did some days before doing this. hope you find some solution to this and dont give up on xiaomi just for a mess that you did xD
Click to expand...
Click to collapse
Igor, do you think you could at least share your modemst partition and/or your QCN file? I could use this to find the differences between my modem configurations and set it exactly as the brazilian's factory default modem.
If you're worried about IMEI scamming, then a simple printscreen from certain screens on QPST/QXDM will suffice, since I can tell what's wrong from them. If you're willing to help me (and have a rooted device), please, do tell and I can walk you through how to get them. Thanks!

http://en.miui.com/thread-218200-1-1.html
Follow this tutorial.
My signal came back but I'm having frequent signal loss. The only solution is to turn on/off airplaine mode.
I've to send it to tecnical assistant but I don't want to stay without the phone.
Acttually I'm not sure if the 4g works, because my city only supports 3G. When the data connection is on I don't loss the signal.

LuizHPiccinini said:
Follow this tutorial.
Click to expand...
Click to collapse
That's the exact tutorial I've followed to recover my IMEI. And I even mentioned that in the OP, bud. My problem happened after that. Please read more carefully.

Sorry, I just saw the second link.

Drezus said:
Igor, do you think you could at least share your modemst partition and/or your QCN file? I could use this to find the differences between my modem configurations and set it exactly as the brazilian's factory default modem.
If you're worried about IMEI scamming, then a simple printscreen from certain screens on QPST/QXDM will suffice, since I can tell what's wrong from them. If you're willing to help me (and have a rooted device), please, do tell and I can walk you through how to get them. Thanks!
Click to expand...
Click to collapse
as soon i get to my pc with the programs, ill try to help you if nobody comes first :highfive:

igorinolw said:
as soon i get to my pc with the programs, ill try to help you if nobody comes first :highfive:
Click to expand...
Click to collapse
Thanks a lot!

Oh gosh guys, I hope you can help me too! I've got the exact same problem with my HM2014819!

Did you manage to fix that?
Hi the exact same thing happened to me, I had no mobile internet at all and I fixed that qcn stuff but all I could find was asian versions, I get no 4G network and I have no other brazilian file to compare. If you managed to fix that, please please share, thanks a lot.

No Network

Hi good people, I am facing a problem. Around 8 hours back I tried calling someone but the call didn't connect so I restarted the phone and then I lost the network. I tried reboot, flashed different ROMs (unofficial CM14, cm13 nightly build n MM nougat backup), tried with GAPPS and without GAPPS but the problem is persisting. I even tried swapping the Sim cards before that but of no use. I tried debugging by using *#*#4636#*#* but ping test is failed and also there is "TURN RADIO ON" I believe ideally it should be "TURN RADIO OFF". please have a look at the screenshots. I'm almost dying without making important calls.
Update: Guys I have got it working.. Kindly look into my below posts. Please don't misguide people for small issues.
Thanks

In the screenshot we can also see, GSM SERVICE IS OFF. it stays the same even after clean flashing a new custom ROM.

Got it working. Flashed latest COS ROM file however the situation was still the same. Then I removed sim, switched on airplane mode restarted. After reboot inserted Sim then again restarted n then I got the signal
1. Removed Sim card, switched on airplane mode from both power menu and notification toggle.
2. Restart, inserted Sim card and switched off airplane setting from setting. (Notification toggle and power menu didn't work) then got the network.
Please note I tried with only one sim in sim 1 tray. Later I got the network for 2nd sim as well

Narasimha12 said:
Got it working. Flashed latest COS ROM file however the situation was still the same. Then I removed sim, switched on airplane mode restarted. After reboot inserted Sim then again restarted n then I got the signal
Click to expand...
Click to collapse
Which rom did you flash and what was your method of flashing?
You also said simply flashing didn't work. It was what you did with reboot, aeroplane mode and taking out and reinsert the Sim that worked?

I've had the same problem for almost a month now... and i gave my phone to the service center. They called up to inform me that its a motherboard failure and they'll fix it.. I'll provide further info when I get my phone back (probably in 3-4 days)
P.S I tried almost every method to make it work. So if you couldn't make it work in first 2 days or so, dont waste your time and just give it for the servicing (make sure its in Stock OS so that they dont ask any questions about root xD )

lekhwani said:
Which rom did you flash and what was your method of flashing?
You also said simply flashing didn't work. It was what you did with reboot, aeroplane mode and taking out and reinsert the Sim that worked?
Click to expand...
Click to collapse
I flashed almost every latest ROM. But no ROM got the network back. So as a last resort I flashed COS 12.1 and still didn't get the network. Then I removed both the sims, activated flight mode restarted the device, left it couple of minutes and inserted only one sim in first slot. Holla I got the network. Then everything is back to normal
If u r facing the same problem I would suggest u to activate flight mode n restart. If it doesn't work try by removing sim cards, if it still doesn't work try COS 12.1.

lekhwani said:
Which rom did you flash and what was your method of flashing?
You also said simply flashing didn't work. It was what you did with reboot, aeroplane mode and taking out and reinsert the Sim that worked?
Click to expand...
Click to collapse
Usual procedure of flashing. Wipe cache, dalvik, system and data. Flash ROM + Gapps. Reboot

Try to search in the forum. There is a lot of threads with the same problem with the Zuk Z1. It is a hardware problem.
Enviado desde mi Redmi Note 3 mediante Tapatalk

Your modem and baseband sections may be damaged. Modem structure is hidden under qualcomm structure. To Access and repair those sections, you need to do some modifications. I managed to make my Zuk Z1 worked again with some tweaking. Altering that part of the phone is illegal due to its restricted elements such as IMEI number. That's why I cannot post a tutorial here. İt is not allowed. However, I can help you if you personally contact me. I hope you get your signal back soon.

psyckoze said:
Your modem and baseband sections may be damaged. Modem structure is hidden under qualcomm structure. To Access and repair those sections, you need to do some modifications. I managed to make my Zuk Z1 worked again with some tweaking. Altering that part of the phone is illegal due to its restricted elements such as IMEI number. That's why I cannot post a tutorial here. İt is not allowed. However, I can help you if you personally contact me. I hope you get your signal back soon.
Click to expand...
Click to collapse
Please follow xda rules and don't tell people illegal things where they get in trouble. Keep in mind, that's not an illegal forum

Sure thing but I have already mentioned it. I didn't post anything illegal. So, take it easy.

psyckoze said:
Your modem and baseband sections may be damaged. Modem structure is hidden under qualcomm structure. To Access and repair those sections, you need to do some modifications. I managed to make my Zuk Z1 worked again with some tweaking. Altering that part of the phone is illegal due to its restricted elements such as IMEI number. That's why I cannot post a tutorial here. İt is not allowed. However, I can help you if you personally contact me. I hope you get your signal back soon.
Click to expand...
Click to collapse
Hej. I manage to mess upp my baseband/modem proberly when flashing a rom or i messed up in twrp.
Phone show up imei as null and unknown baseband so i would really appriciate you help here.
I still have orginalbox that show my imei so i can enter the correct one when needed.

psyckoze said:
Your modem and baseband sections may be damaged. Modem structure is hidden under qualcomm structure. To Access and repair those sections, you need to do some modifications. I managed to make my Zuk Z1 worked again with some tweaking. Altering that part of the phone is illegal due to its restricted elements such as IMEI number. That's why I cannot post a tutorial here. İt is not allowed. However, I can help you if you personally contact me. I hope you get your signal back soon.
Click to expand...
Click to collapse
Hi, I haven't still gone to the service centre. Kindly pm me the tutorial for getting signals back.

Yureka Plus network signals are not present on 2g/3g/4g

Hi
I have done repartition of yureka plus and then come again of stock partition. I was trying android p. I have flashed volte modem many times. Now i am not able to see network Currently i have installed stock roms COS 12.1 but still no success.
I can see cross sign on both network. I have tried *#*#4636#*#* method also.
I am able to search network manually but cannot select it. PFA screenshot.
2-3 times i see gsm network . but it lost again.
Anybody please help. Shopkeeper said problem is in mother board. But, i did not harm phone physically.

praveen139 said:
Hi
I have done repartition of yureka plus and then come again of stock partition. I was trying android p. I have flashed volte modem many times. Now i am not able to see network Currently i have installed stock roms COS 12.1 but still no success.
I can see cross sign on both network. I have tried *#*#4636#*#* method also.
I am able to search network manually but cannot select it. PFA screenshot.
2-3 times i see gsm network . but it lost again.
Anybody please help. Shopkeeper said problem is in mother board. But, i did not harm phone physically.
Click to expand...
Click to collapse
Ss clearly show ur imei ****ed . Restore back ur imei

Yes, your IMEI is 1234567890
Restore efs backup in twrp

Nobackup
Rajendran Rasa said:
Yes, your IMEI is 1234567890
Restore efs backup in twrp
Click to expand...
Click to collapse
I dont have backup. Yesterday whole day i was trying xda methods. but unable to restore imei.
in below link usb hs-diagnostic 9006 driver download is not working .
https://forum.xda-developers.com/yureka/help/recovering-lost-imei-yu-yureka-yunique-t3331485