D850 AT&T 3G not working?

[sherrypizza]

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?

 

[itsbighead]

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?

Could it possibly be a problem with the network frequency that your carrier runs on>?

 

[sherrypizza]

Could it possibly be a problem with the network frequency that your carrier runs on>?

No, my sim on my friends cellphone works great on 3G

 

[Hnk1]

No, my sim on my friends cellphone works great on 3G

Did you find solution ?

 

[sherrypizza]

Did you find solution ?

Yeah, I sold it

 

[tiguy99]

Did you find solution ?

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!

 

[Hnk1]

Yeah, I sold it

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!

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!

 

[tiguy99]

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!

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!

 

[Hnk1]

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!

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

 

[tiguy99]

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

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

 

[Hnk1]

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

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

 

[tiguy99]

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

Thats why I mentioned looking for the LG G3 and gave the proper link.

Always confirm before you flash!!!