[GT-P7500R (P4)] Tab 10.1 3G stopped working after airplane mode. (CM10.1 Nightly)
I updated to the latest nightly (9/22) to try and relieve this problem to no avail. I've been running CM Nightlies on my P4 since they've been available. I always manually download them since, for whatever reason, Rom Manager seems to detect my device as the P4-wifi. I assure you the 3G (HSPA) modem works. I have a SIM slot, with SIM that has activated service (UMTS/HSPA). My cell phone is on the same networks and it picks up signal from my carrier fine.
With that out of the way; My issue:
Two days ago, I was leaving my house to visit family, and I wasn't going to bring my charger for my Tab, so I put the device in airplane mode to conserve battery. In hindsight, I should have just asked the device to power off, but that's besides the point. When I tried turning off Airplane mode, the cellular network did not become available again; this situation has not changed since.
What I've done: Rebooted the device after switching out of airplane mode, re-entered airplane mode and left it again, updated to the latest CM. I've opened my tab and reseated the connections for SIM and antenna (at least, the connections I can reseat, I have), I've also completely disconnected power by unplugging the battery and reconnecting it. Additionally, I got into some of the hidden menus and verified that WCDMA, which, I believe is the underlying tech for the local HSPA connection, is preferred to the cell radio.
Looking at the device, if I ask it to check for mobile networks, the list comes back blank. The network status shows "UNKNOWN:0" and the lockscreen shows "NO SERVICE." instead of "NO SIM" (which is what it shows when I remove the SIM). From what I can tell the radio has shut off and will not come back on.
Throughout all this Wifi still works perfectly, so the device isn't useless, however, I'm planning to sell this device and I would like it to be as fully functional as possible when I hand it off to it's next owner, so getting this solved is very important to me. Any and all suggestions are appreciated and I'm basically willing to try anything at this point. I feel as though I've tried everything short of a factory reset, which I'm not sure if that would help (I've even wiped cache and dalvik).
In case it's relevant, I'm in Canada, carrier is Telus.
Thanks for reading.
EDIT: I've just finished restoring the device to Stock 4.0.4 (I've used this stock image before when I had issues with the device and confirmed it is fully functional) and I am still having trouble. this points to either a carrier issue or a hardware issue. I will be calling the carrier in the morning, despite believing that this isn't the case. any suggestions on what could be the problem are still welcome, I'm willing to try just about anything at this point.
Cell: HTC Sensation 4G (Unlocked, S-Off, on Telus) - CM10.2 build by Albinoman887
Tab: Samsung GT-P7500R (P4) - CM10.1 Official Nightlies