Last week I asked the below question on XDA-Developers and haven't received any replies yet. Perhaps some of you might have the same problem...
Originally Posted by iMORT3rnAL on XDA-Developers
I did some googling and found that a lot of people struggle with this, but no one seems to have a definite solution.
Recently I flashed a newer ROM on my SGS I9100, Resurrection Remix v3.0.2 (JB 4.1.1), and noticed that I have no data access on the mobile network. I checked and found that there were no APNs in the list and I couldn’t add any either.
I tried the following which was suggested by a few people:
- Reboot the device
- Disable/enable flight mode and reboot
- Choose “3G Only”
- Add APN and wait a few minutes before saving
- Add APN and use back button instead of menu option to save
- Reinstall ROM
None of the above solved the problem. I also replaced the apns-conf.xml file with one from a known working ROM, but that didn’t work either.
I then tried different kernels, modems and ROMs, but to no avail.
(Kernals, modems & ROMs listed in order by which it was tested)
Siyah 4.0.1 (From ResRemix)
xxKernel (came with cMIUI, didn’t check the version)
Siyah 4.1 Beta6 (from ResRemix)
Siyah 4.1 RC1 (From website)
Resurrection Remix v3.0.1 (JB v4.1.1)
Resurrection Remix v3.0.2 (JB v4.1.1)
cMIUI v2.8.10 (ICS 4.0.4)
Resurrection Remix v3.0.5 (JB v4.1.1)
Finally I decided to go back to ResRemix v3.0.1 and it works again. But now I need to know why, because it means that I’m stuck on an old ROM.
My next step would have been to replace the SIM card, but I now know it's a software related problem.
Just to confirm, my data is working with the following: (It also works with other combinations of kernels and modems, but not ROMs)
Resurrection Remix v3.0.1
Siyah v4.1 RC1
Any ideas as to what might be the problem?