Develop Bugs

D850 AT&T 3G not working?

I got a rooted G3 D850 from a guy, and flashed Cloudy 2.2. 3G is not working when I select WCDMA from network mode even all the APN setting s are correct. As soon as I select WCDMA, the mobile signals disappear. I had D850 in past and never had this issue over cloudy or any ROMs. What might be the issue, maybe some messed with hidden menu (3845) settings?

sherrypizza said:
I got a rooted G3 D850 from a guy, and flashed Cloudy 2.2. 3G is not working when I select WCDMA from network mode even all the APN setting s are correct. As soon as I select WCDMA, the mobile signals disappear. I had D850 in past and never had this issue over cloudy or any ROMs. What might be the issue, maybe some messed with hidden menu (3845) settings?
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Click to collapse
Could it possibly be a problem with the network frequency that your carrier runs on>?

itsbighead said:
Could it possibly be a problem with the network frequency that your carrier runs on>?
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Click to collapse
No, my sim on my friends cellphone works great on 3G

sherrypizza said:
No, my sim on my friends cellphone works great on 3G
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Click to collapse
Did you find solution ?

Hnk1 said:
Did you find solution ?
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Click to collapse
Yeah, I sold it

Hnk1 said:
Did you find solution ?
Click to expand...
Click to collapse
Check your EFS data.
IMEI # should not read 0
NV data could also be corrupt.
In that case you have to research how to get it back to normal or pay a shop to repair it back for you.
Back to stock .tot or .kdz flash wont fix this problem.
Neither will a factory reset.
Always backup your EFS data especially when your phone is healthy and everything's working normally!

sherrypizza said:
Yeah, I sold it
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Click to collapse
tiguy99 said:
Check your EFS data.
IMEI # should not read 0
NV data could also be corrupt.
In that case you have to research how to get it back to normal or pay a shop to repair it back for you.
Back to stock .tot or .kdz flash wont fix this problem.
Neither will a factory reset.
Always backup your EFS data especially when your phone is healthy and everything's working normally!
Click to expand...
Click to collapse
Actually I was not expecting that the values would be affected by using the hidden menu to fix my network to LTE only. I later changed it to sort of GLOBAL (GSM/WCDMA/LTE) but that didnot fix it.
I then backup my EFS and tinkered with hidden menu and i was successful in bringing back LTE, however, I am stuck with no 3g. I guess I will need to work with QPST and QXDM now. I am now making a second backup with EFS tool.
I just thought it wouldnot go too far that I will need to JTAG it.
Imei is fine. Just need to see NV values and would update!
UPDATE :
Strangely all the NV values are right. I restored my EFS to old state (I have two backups). The LTE is gone again. (this was immediately after LTE and 3g were gone) while flashing other EFS does enable back LTE. So it is all in the hidden menu!
I tinkered with LTE again in hidden menu and it is working again.
REQUEST @tiguy99
Download EFS Tool from here
http://forum.xda-developers.com/attachment.php?attachmentid=3087596&d=1419867628
Main thread of it
http://forum.xda-developers.com/gal...09-06-14-efs-professional-t1308546?styleid=18
1. go in backup tab
2. select all partitions
3. Select 3 partitions
backup modem, modemst1 and modemst2 and upload it for me so I can try to restore the settings to see if that works.
You will need root and busybox installed.
Many thanks!

Thats awesome!
Glad you got it working quickly.
Took me a week with my G2 trying to figure it out since most of the guides didn't fix my problem 100%
It would fix then 3 minutes later I'd lose 3G & 4G again
I had to find a QCN file load that and then work with both QPST and EFS Pro to get it working.
Needed all #s to correct it.
Mine finally fixed when the MEID was corrected as well.
That was weird bc I dont ever remember changing it the first
Place!
Hnk1 said:
Actually I was not expecting that the values would be affected by using the hidden menu to fix my network to LTE only. I later changed it to sort of GLOBAL (GSM/WCDMA/LTE) but that didnot fix it.
I then backup my EFS and tinkered with hidden menu and i was successful in bringing back LTE, however, I am stuck with no 3g. I guess I will need to work with QPST and QXDM now. I am now making a second backup with EFS tool.
I just thought it wouldnot go too far that I will need to JTAG it.
Imei is fine. Just need to see NV values and would update!
UPDATE :
Strangely all the NV values are right. I restored my EFS to old state (I have two backups). The LTE is gone again. (this was immediately after LTE and 3g were gone) while flashing other EFS does enable back LTE. So it is all in the hidden menu!
I tinkered with LTE again in hidden menu and it is working again.
REQUEST @tiguy99
Download EFS Tool from here
http://forum.xda-developers.com/attachment.php?attachmentid=3087596&d=1419867628
Main thread of it
http://forum.xda-developers.com/gal...09-06-14-efs-professional-t1308546?styleid=18
1. go in backup tab
2. select all partitions
3. Select 3 partitions
backup modem, modemst1 and modemst2 and upload it for me so I can try to restore the settings to see if that works.
You will need root and busybox installed.
Many thanks!
Click to expand...
Click to collapse

tiguy99 said:
Thats awesome!
Glad you got it working quickly.
Took me a week with my G2 trying to figure it out since most of the guides didn't fix my problem 100%
It would fix then 3 minutes later I'd lose 3G & 4G again
I had to find a QCN file load that and then work with both QPST and EFS Pro to get it working.
Needed all #s to correct it.
Mine finally fixed when the MEID was corrected as well.
That was weird bc I dont ever remember changing it the first
Place!
Click to expand...
Click to collapse
Cheers mate but actually , 3g is not working. Could you get me the two files / QCN etc for me to flash on my device ?
Not EFS because that has device specific information as well.
I would be really glad if you can mate!
Many thanks!
I also made a thread here :
http://forum.xda-developers.com/lg-g3/general/request-3g-2g-lte-d850-t3300908#post64977857

Hnk1 said:
Cheers mate but actually , 3g is not working. Could you get me the two files / QCN etc for me to flash on my device ?
Not EFS because that has device specific information as well.
I would be really glad if you can mate!
Many thanks!
I also made a thread here :
http://forum.xda-developers.com/lg-g3/general/request-3g-2g-lte-d850-t3300908#post64977857
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Click to collapse
It was for my G2.
It's a different phone.
Google gsmforums lg g3 qcn and see if you can find the qcn file that way.
Thats how I found the one for my G2
Edit
Did a search and found this site.
http://forum.gsmhosting.com/vbb/f799/qcn-file-thread-1867281/index2.html

tiguy99 said:
It was for my G2.
It's a different phone.
Google gsmforums lg g3 qcn and see if you can find the qcn file that way.
Thats how I found the one for my G2
Edit
Did a search and found this site.
http://forum.gsmhosting.com/vbb/f799/qcn-file-thread-1867281/index2.html
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Click to collapse
Thanks alot for guiding me in the right direction. Restoring QPN file really helped via QPST > Software Download Mode > Restore QPN.
However, the qcn file you mentioned is for another device!
QCN file must be device specific.
Good Luck to all of you and this is going to be a reference in case someone wants to fix their QPN (updating the link below)
http://forum.xda-developers.com/lg-g3/general/request-3g-2g-lte-d850-t3300908

Hnk1 said:
Thanks alot for guiding me in the right direction. Restoring QPN file really helped via QPST > Software Download Mode > Restore QPN.
However, the qcn file you mentioned is for another device!
QCN file must be device specific.
Good Luck to all of you and this is going to be a reference in case someone wants to fix their QPN (updating the link below)
http://forum.xda-developers.com/lg-g3/general/request-3g-2g-lte-d850-t3300908
Click to expand...
Click to collapse
Thats why I mentioned looking for the LG G3 and gave the proper link.
Always confirm before you flash!!!

I think i brokekeded it HELP!

Hi guys,
Being the arrogant bigheaded know-it-all that I am I thought I could do this by myself. Alas I was wrong.
I was attempting to carrier unlock my s4 mini (i9195) on EE, I rooted it first which was a success. I then tried the "regionlockaway" approach which claimed to be a success but after several reboots was not =[
I then delved deeper into the forums and read that it may work if i were to odin flash my device to MJ7.
I followed the steps of un checking the auto-reboot and F. reset boxs and proceded to put phone into "odin mode" and then Flash, disconnect, power off, boot back into odin mode, reflash and then boot normally.
This went horribly wrong. my poor little phone is very confused. it doesn't know its baseband and is displaying IMEI null.
I have done some further research and all post seem to say I must reflash to original ROM or inject IMEI?
I cannot find the required ROM files and IMEI injection, unless as simple as "download file x, insert IMEI from phone sticker into box x, flash with program x and all will be fine" then I am stuck in a lonely phoneless place.
PLEASE HELP ME! and i promise I wont try these things again!
Thanks in advance guys!

Not an expert at trying to restore IMEIs but maybe try flashing the latest unbranded firmware ... Though the download is slooow but it's worth a shot http://www.sammobile.com/firmwares/download/48645/I9195XXUCOD3_I9195BTUCOD1_BTU/
Also just for the future your best to save EFS folder from your phones root. Also developer Wanam does a partition backup tool which will allow you to backup and restore your EFS.

RuffBuster said:
Not an expert at trying to restore IMEIs but maybe try flashing the latest unbranded firmware ... Though the download is slooow but it's worth a shot
Also just for the future your best to save EFS folder from your phones root. Also developer Wanam does a partition backup tool which will allow you to backup and restore your EFS.
Click to expand...
Click to collapse
Thanks man i'll give it a go and EFS folder?

i love you! IT WORKED! thanks dude!!!

Unknown BASEBAND, Unknown EMI no.

Dear all,
I was using eclipse rom for more than a year, but suddenly my network has gone, and in the baseband its written "unknown" i tried ti install RESSURECTION REMIX 7.1 rom but the problem still persist. Please can anyone guide me how to fix no network issue, and IMEI Problem
Note - IMEI also showing unknown

imrananis said:
Dear all,
I was using eclipse rom for more than a year, but suddenly my network has gone, and in the baseband its written "unknown" i tried ti install RESSURECTION REMIX 7.1 rom but the problem still persist. Please can anyone guide me how to fix no network issue, and IMEI Problem
Note - IMEI also showing unknown
Click to expand...
Click to collapse
Hello,
It seems like from what you're describing, you have corrupted/deleted your phone's efs. Do you have a backup stored somewhere? if you do, restore the EFS partition via TWRP/CWM and you should be good to go. if this happened because you restored a backup, try this link. If you dont, then im sorry to say that there is no way to help you. Dont try to use another person's EFS partition because it is illegal.
Regards

Valkyrie146 said:
Hello,
It seems like from what you're describing, you have corrupted/deleted your phone's efs. Do you have a backup stored somewhere? if you do, restore the EFS partition via TWRP/CWM and you should be good to go. if this happened because you restored a backup, try this link. If you dont, then im sorry to say that there is no way to help you. Dont try to use another person's EFS partition because it is illegal.
Regards
Click to expand...
Click to collapse
Thanks for reply
I dont have efs backup, will going back to stock help?

wiped efs partition guys!!!need help

Hello guys!!I have installed chinese twrp and unfortunately, I have wiped efs partition done without knowing me, now there was no signal at all,i have installed stock rom for "N" number of times but still then no sign of signal.IMEI showing 00.kindly help me guys

vishaldroid said:
Hello guys!!I have installed chinese twrp and unfortunately, I have wiped efs partition done without knowing me, now there was no signal at all,i have installed stock rom for "N" number of times but still then no sign of signal.IMEI showing 00.kindly help me guys
Click to expand...
Click to collapse
rip

yikes..

There's a lot of warnings throughout the forum to not use the Chinese TWRP, even Alberto said so in his Unofficial TWRP thread, you can't blame anyone but yourself.

vishaldroid said:
Hello guys!!I have installed chinese twrp and unfortunately, I have wiped efs partition done without knowing me, now there was no signal at all,i have installed stock rom for "N" number of times but still then no sign of signal.IMEI showing 00.kindly help me guys
Click to expand...
Click to collapse
New mother board is the only thing that's going to get it back life. Please do not pm I can not help you

efs
efs is working fine but problem is with cellular network.im sorry to bother you flashalltime

vishaldroid said:
efs is working fine but problem is with cellular network.im sorry to bother you flashalltime
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Click to collapse
If your IMEI is wiped there is nothing you can do.

vishaldroid said:
efs is working fine but problem is with cellular network.im sorry to bother you flashalltime
Click to expand...
Click to collapse
Check you sim card, apn's as well, if you can see your IMEI.

efs
yeah, i did but still showing imei 00 and hoping some developer would fix this issue.There are lots of people who are facing this problem.If some developer should see into this matter would be great

Dual IMEI Fix

If anyone find how to fix dual imei then please reply ...i bricked my phone by installing boot logo of corvus rom in miui then i repair my phone with sp flash tool but unfortunately i click on format-all+download
Then my phones bootloader got lock,imei lost,wifi mac address lost, Bluetooth address lost but i repair all except imei 1,imei 2 means sim 2 work after writing imei in miui meta tool but sim 1 is not fixed even if we write sim 1 imei in miui meta tool we got nvdata error in official miui and also not worked in engineering rom..so at all please if someone fixed or know how to fix please reply...

You can fix imei 2 using meta maui.you have lots of videos that show you how to do it. I had the same problem.now imei 1 is null(not working) but imei 2 is ok.the only way for us to fix them both is to get a twrp backup from a working phone of the files nvdata,nvram,nvcfg,persist, protect_s,protect_f. Then restore them and change both imei.

ariber14 said:
You can fix imei 2 using meta maui.you have lots of videos that show you how to do it. I had the same problem.now imei 1 is null(not working) but imei 2 is ok.the only way for us to fix them both is to get a twrp backup from a working phone of the files nvdata,nvram,nvcfg,persist, protect_s,protect_f. Then restore them and change both imei.
Click to expand...
Click to collapse
Bro i also try this also but nothing happened even imei 2 will not also work with that method

[email protected]íR [email protected]Ñ said:
Bro i also try this also but nothing happened even imei 2 will not also work with that method
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Click to collapse
It does work man. I had the same problem. Now only imei 2 works. I cant find backup files i mentioned above

ariber14 said:
It does work man. I had the same problem. Now only imei 2 works. I cant find backup files i mentioned above
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Bro listen I backup nvram and nvdata from custom recovery of other phone but when I restore it to my phone nvdata successfully restored but nvram is not restoring showing error then I flash engeenering rom then restore in that rom both successfully restore but no imei is working and if I go to miui official then nvdata corrupted error.... What method r you telling bro if you have different one

[email protected]íR [email protected]Ñ said:
Bro listen I backup nvram and nvdata from custom recovery of other phone but when I restore it to my phone nvdata successfully restored but nvram is not restoring showing error then I flash engeenering rom then restore in that rom both successfully restore but no imei is working and if I go to miui official then nvdata corrupted error.... What method r you telling bro if you have different one
Click to expand...
Click to collapse
you flash eng. rom. then got to fastboot, delete nvram,nvdata. using meta maui you can put ONLY imei2 (press write about 5 times then wait 1 minute before disconecting maui..) start the phone and check if imei 2 is working. at this part you can even flash twrp and make backup of files to use them later. the important thing is while being on eng rom, to make imei 2 working and showng active. then flash stock rom,avoid flashing stock nvdata. right after flashing,enter fastboot and flash backup nvdata. if it wont allow you to flash nvram(check if its from a rn8p phone) then flash twrp,mount nvram,nvdata,nvcfg and flash the backups from there.there are lots of combinations.

ariber14 said:
you flash eng. rom. then got to fastboot, delete nvram,nvdata. using meta maui you can put ONLY imei2 (press write about 5 times then wait 1 minute before disconecting maui..) start the phone and check if imei 2 is working. at this part you can even flash twrp and make backup of files to use them later. the important thing is while being on eng rom, to make imei 2 working and showng active. then flash stock rom,avoid flashing stock nvdata. right after flashing,enter fastboot and flash backup nvdata. if it wont allow you to flash nvram(check if its from a rn8p phone) then flash twrp,mount nvram,nvdata,nvcfg and flash the backups from there.there are lots of combinations.
Click to expand...
Click to collapse
Bro i understand what r you telling let me snd you these backups of working phone of my friend that is also redmi note 8 pro then I will see what you will do in your phone for Working both imei..

[email protected]íR [email protected]Ñ said:
Bro i understand what r you telling let me snd you these backups of working phone of my friend that is also redmi note 8 pro then I will see what you will do in your phone for Working both imei..
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Click to collapse
Ok thanks.and let me know whan you did with your imei.

ariber14 said:
Ok thanks.and let me know whan you did with your imei.
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Click to collapse
Bro where I will snd these backups to you... Also these backups are from recovery

from recovery is fine
te send them,you can put them on a folder to google drive and make that folder shared by sending the link. or we can use share me appclication.there are lots of ways. or you can send them through email. choose whatever you like