Cannot Connect to AT&T Network (Neither Voice Nor Data)

---

For some reason I cannot connect to AT&T's network for voice/data. I had been running MIUI for about 3 months and all was good. I came back from a trip Thursday and the phone wouldn't find a network after turning off airplane mode, but rebooting seemed to fix it. However, today I cannot get it to connect at all.

I have tried:
Wiping cache/davlik cache
Fixing permissions
Tried searching for a network operator through settings->mobile network->network operators, got nothing
Wiping user data and switching to ZEUS Build 6
Tried searching for a network operator again
Went back to 100% stock with GTG's Ultimate Unbrick
Still nothing for network operator under "Available networks" (Default setup is greyed out)

I'm going to guess either my SIM or 3G chip burned out? I was using the phone heavily the past few days with a ton of GPS stuff to get around Atlanta and it did get pretty hot on the car dash. I'll try taking it to an AT&T store tomorrow (ugh) but am open to any suggestions before I do so .

There are a few options I would consider:

1. Go to the apn and set up a new apn and save it. Select it and then reboot. There are a few floating around. Check my how to thread in the q/a. I posted one there. Make sure you create one and then save it.

2. Try flashing a different modem.

3. Take out the external micro sd. Back up your stuff from the internal sdcard. Factory reset from in the ROM. Warning: a factory reset from within the ROM will erase EVERYTHING, including pictures. Make sure you save everything first. Reboot. And if that doesn't work, odin with a re partition pit file or use one of the heimdall 1-click and then do a reset again.

4. Possibly remove the Sim and clean it. I've heard the Sim socket is very fragile and breaks easily. Use caution. You can always have the att guys do it and let them break it.

Gl

he said he did try flashing another rom and odining back to stock. if that doesnt work, nothing will. hopefully you still have a warranty.

Already restored to stock (and again from within the stock rom)... Forgot about my pictures

Tried I997UCKL2 and I997UCLB3 modems, with and without custom APNs.

Tried cleaning the SIM

Funnily enough I do get service bars (4/5) after the phone has been on for about a minute, but no HSPA+ icon and still can't make calls/MMS/internet (calls are about 5s of silence followed by an abbreviated dialing tone, then "Call Ended"). Yup, I think it's borked... Guess it's time for an S3! Thanks for the help though.

Imei messed up?

Sent from my SAMSUNG-SGH-I747 using xda premium

Originally Posted by crash822

Imei messed up?

I can bring up the IMEI dialog fine (*#06#)... Other than that I don't know how else to check it.

you paid your bill right?

Originally Posted by The Jack of Clubs

you paid your bill right?

Haha yep... I just dug out my old old phone (LG CU500 iirc). Found the charger and made a call. Seriously old school but at least I'm sort of connected until I can get my Infuse sorted!

Originally Posted by pacallen

Already restored to stock (and again from within the stock rom)... Forgot about my pictures

Tried I997UCKL2 and I997UCLB3 modems, with and without custom APNs.

Tried cleaning the SIM

Funnily enough I do get service bars (4/5) after the phone has been on for about a minute, but no HSPA+ icon and still can't make calls/MMS/internet (calls are about 5s of silence followed by an abbreviated dialing tone, then "Call Ended"). Yup, I think it's borked... Guess it's time for an S3! Thanks for the help though.

Sorry to hear about your pictures. I tried to warn you.

The last thing i can think of is to leave your battery out overnight. And then put it back tomorrow.

It sounds like it's hardware related though.

(Different ROM like miui and zeus have their own custom build.prop ril settings and apn. These potentially can mess with your phone connection if the partition messes up.
I wanted to make sure it was not a partition screw up. A double flash in heimdall uckj4 or uclb3 with boot loader checked or one of the Odin un-brick using a pit file would have clear this. Sounded like you did this already. Another user have reported clearing their efs in odin. I would only try this if you have backed up your efs position, either in root explorer or zen tool kit.)

Again, sounds like hw...

Gl

Originally Posted by qkster

The last thing i can think of is to leave your battery out overnight. And then put it back tomorrow.

Well when I transferred my sim to my old dumb phone I left my Infuse off (about 3 hours). I just tried it again for kicks and miraculously it works perfectly now! Now I get to reinstall everything again (yay...), but I'm wondering if my sim slot is on its way out or something... Not sure why it would suddenly start working again.

Oh well, time to try out Zeus (MIUI was a little too buggy for me).

Thanks again all... hopefully it doesn't die on me again!