Root [Sprint/Cricket] lost Mobile Data connection: radio issues

[dan330]

need help please...

setup:
sister's Sprint Galaxy S3 blue
Clockwork recovery v5.5.0.4
was working fine on radio LJ7; with ROM: TPR (the People's ROM) v3.17 (android 4.1)
her new Galaxy watch application would not load on the old android version 4.1 (incompatible)

so I upgraded her to ROM TPR 3.31. (android 4.3) NOT KitKat.
did a full wipe.. clean install.
it worked fine.. and her watch application loaded from the playstore.
but it lost all mobile data connection. works fine on wifi. and calls and texting.

I thought I needed to load a new radio.. MK3 (because TPR 3.31 is based on MK3 radio)
so I came to this thread and got the MK3 radio
http://forum.xda-developers.com/showthread.php?p=53076561
I used Clockwork recovery to flash the radio.
but still no help. at least now it trys to connect.. but errors 67.. cannot connect.
the phone still works fine.. but still no mobile data.

I even tried a full wipe again (user data, cache, dalvik) and did these different ways:
flash just the TPR 3.31 again.. same no change
flash MK3 then TPR... no change
flash TPR then MK3.. no change
downloaded a different android 4.3 ROM (MOAR v9.01).. no change

I also have the exact sprint GS3 phone ...
and tried it on my phone.. same issues!!!!!

so... please guys. what do you think is the issue?? how can I fix this?

 

[Mikestony]

Where did you download the radio file from?
Sorry... I'm mobile on tapatalk And I'm lousy at navigating on tapatalk ☺

 

[dan330]

I updated the OP with the where I got the radio modem

at XDA developers.. and made sure it was for Sprint and GS3
[MODEM][FLASHABLE] MK3 Sprint Modem - Page 21 - xda-developers

I can only guess:
1. need a different custom recovery to flash new radio?
2. lost some file when I flashed TPR 3.31 ROM. but that happened to 2 different phones?

I am lost .. and out of things to try

 

[Mikestony]

Hmmm... Throwing some ideas out there... Did the md5 match?
Cycle airplane mode?
Is that tpr rom and the Moar rom aosp based?

 

[dan330]

Someone suggested..
##72786#

What does that do? And how does it fix it?

 

[Mikestony]

Someone suggested..
##72786#

What does that do? And how does it fix it?

Not sure.. I have a list of ## codes bookmarked on my computer at home... I'll have to look it up later...
Sorry for my lousy help... Being mobile limits me

 

[dan330]

It cool.. I appreciate your efforts


##72786# on my de-activated phone.
it rebooted and tried to activate my phone... of course I cant do that.
interestingly.. the "3G" icon showed up on the Notification bar.. while it was trying to activate my phone.. it even looks like it is "loading" some new data to the phone and completes the download!
since it could not activate it.. it stopped.
I am back to no data connection.

I even rebooted the phone.. it is now trying to activate this phone.

I have NOT tried it on my sister's phone yet.. because I want to be sure before I try that on hers

 

[dan330]

update:

the command ##72786#
worked! it fixed the issue. now the Mobile Data works. using the new modem software MK3

reports from my sister. (I have not fixed my un-active phone - because it has NO carrier service to use to fix it)
she said it was slower data speeds in general for both 3G and 4G.
and at home it normally finds 4G.. now only finds 3G.

I want to try other modems softwares for Sprint. but not sure which to try.
if my S3 was fixed.. I could try modems before putting on hers.