Root [International] Mobile Data not working

[FMaams]

My mobile data in Samsung SIII works for sometime and then it fails. Even if I restart it using the option in the settings it does not work. It works only after i restart the entire phone. Any ideas / fixes?

 

[hopedpocketts]

did youu recently receive a firmware update. if so, back up apps using titanium backup. factory reset device. then restore apps.
hope this helps.

 

[d13g0]

I'm having this problem too.

During ICS I had no problem....after update to JB I don't have any mobile data at all not even for a second. I have reset my phone, ejected and reinserted my sim card, factory reset, soft reset.

Nothing helps...please someone help. Thank you

 

[d13g0]

ok I finally figured it out!!

How to Get an Unlocked Phone to Work on AT&T & T-Mobile - YouTube

You only do about half the things it says to do...

APN = wap.cingular
Proxy= Not set
Port= 9201
User Name= WAP@CINGULARGPRS.COM
PW= CINGULAR1

I did not touch anything else. When I did it would delete everything else i had entered.

Now for MMS follow these steps:

under a new APN change the following according to the video

APN
Username
PW
MMSC
MMS PROXY
MMS PORT

that's all!! I hope this works for you as it did for me!!