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[Q] Strange issue with 4G, doesn't appear to be IMEI issue.

Hey guys.
I just got my i535 Galaxy S III a few days back, and decided to root it. Paranoia wasn't for me, so I tried CM10. Somewhere along the lines of that, my 4G stops workings. Luckily, I already backed up my IMEI.
I've been trying for a few hours to fix it. I already used the following methods of "fix":
Restoring backup from CWM
Going back to (rooted) stock,
Changing my Mobile Networks settings around,
Phone Info (Couldn't honestly find out what to edit in there, or if anything WAS editable),
restoing IMEI
From what I can see, I have my IMEI, MEID, and phone status reads: "Normal". Yet, when I look at my bars, I get 3 of 3G, instead of my usual (and what my other galaxy S III devices are running currently.)
Samsung's firmware mirror site is down at the moment, so I haven't tried that last resort before returning to Verizon, but do you guys have any thoughts?
Thanks

I have a similar issue - except my phone does not recognize the verizon network. I was rooted with CM9. i've since replaced the SIM and flashed to factory rom. I am seeing my IMEI number, so I don't think that's an issue (right?).
I took it to the verizon store and they want to trade it in, which i am fine with
My biggest concern is removing any trace of root.

I had the same issue when going into cm9, got a new sim yesterday and I got my 4G back.

I'm in the same boat. Just gonna get a new sim card and hope that fixes the issue

[Q] LG 4X HD lost IMEI no network please help.

Hi, any help here would be greatly appreciated. My phone says no sim card and I have no network. Now that might not seem like a major problem but my phone has somehow lost its IMEI number.It has just gone! I have not changed the software it is just a standard phone. Any ideas how I get this IMEI back because without it my phone is useless? I have done all the usual factory resets but nothing works.

galaxy doing the same
bazza1410 said:
Hi, any help here would be greatly appreciated. My phone says no sim card and I have no network. Now that might not seem like a major problem but my phone has somehow lost its IMEI number.It has just gone! I have not changed the software it is just a standard phone. Any ideas how I get this IMEI back because without it my phone is useless? I have done all the usual factory resets but nothing works.
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My wife's samsung galaxy s gt 5380i has suddenly decided not to let her text/call. service state says out of service, mobile network state says disconnected.Her sim works in my iphone, and she has 3 bars showing of her EE signal. I've checked everything I can think of, but no joy. I cleaned the sim contacts, but apart from resetting the phone I'm stymied. My t-mobile sim didn't work in the galaxy either. When trying to call an error message says no mobile network available. I bought the phone a couple of months ago on ebay, it's immaculate and worked flawlessly until this morning. Please help, wife is not impressed...

[Q] How to fik 'Not registering network problem on i747"

Hey I have i747 Galaxy unlock. I bought a sim and it was working until i got home. When i got home the signal totally dropped ..When i got the school it picks up back again at certain parts of school. How can i fix this. I am not a techy . so i would need a step by step guide. I have already rooted the device. I am in Jamaica an di bought the ohone in the States and unable to send it back. What should i do.
I already tried to pulling the battery and removing the sim.
I tried changing to GSM only
I tired restoring the phone and nothing works

I think u need to flash the correct baseband for your phone.. I don't know exactly how to do that... would suggest you to search furthur in stocking your i747
Sent from my GT-I9300 using XDA Premium 4 mobile app

[Q] How do I get my phone to stop saying not registered on network?

I'll start from the beginning, II was rooted and I wanted to speed up my phone so I tried to use SWAP. I never got it to work for some reason but then out of no where I was on the home screen and then my phone rebooted but wouldn't start again, it got stuck at the T-Mobile 4g LTE splash screen. I was still able to go into recovery and all that. So I decided to format my phone. The. That screwed it up even more because then it got stuck at the Samsung Galaxy light start up screen. So then I used Odin and flashed a stock rom. But that still didn't help it got stuck at the T-Mobile splash screen again. I went into recovery and it said era error. I managed to fix that and that went a way. Then after an hour of searching I was able to boot up my phone because some forum said all I needed to do was spam the volume up and down buttons at startup to get it to work. After that I set up my phone but then I was getting any 4G and I couldn't make any calls but it said I had 5bars. I kept getting a message saying not registered on network. Nothing would make it work. I called T-Mobile and I went into setting tried fixing my apn, tried connecting to T-Mobile again but nothing. They just called me back today and after I gave them my i di number they said it's not working because I rooted my phone. It doesn't have a bad i eu or anything it's just not working. I did see that my imei on my account is different than the imei my actual phone displays. I am able to do wifi calling and that works. So obviously something got jacked up when I formatted my phone. I want to know if anyone can help. I didn't back up my efs because I didn't know I had to, the only thing I've rooted before was my tablet. I have a Samsung Galaxy light SGH-T399 . Can anyone help. Ik my thread was long but I wanted to kae sure I got every little detail. And so basically what I need to know is why this keeps happening and what do I need to do to fix this. Could it have been because I formatted my phone completely, and I mean completely I got an error saying no OS found. I have an spouses module for an imei chNger and I changed it back to original and still nothing. My serial number also isn't the same in settings has it is in my battery compartment, it's not even the right length.

SM-G930F "Not registered on network" after updating ROM

Hi all,
Phone was working fine but after upgrading to Android 7 I'm unable to place calls. it says "Emergency calls only" and when I try to place a call I get " Not registered on network".
- Phone was working fine prior to upgrade
- Tried different ROMs and got same result
- Tried another SIM card. Same problem.
- Used my SIM on another phone. Works fine
I read somewhere that this has something to do with the modem certificate and that the only way to fix the problem is by getting a Z3X or Octoplus box to connect to the phone.
Can anyone shed some light on this? I've been messing around with it for the last couple of days but still no luck...
Thanks in advance!

IMEI blocked, phone reported stolen, lost or contract not paid

*Detection* said:
IMEI blocked, phone reported stolen, lost or contract not paid
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I don't think it's like that. It may be, but it's not sure.
If OP said that phone was working properly before the update, I think that his EFS partition's got messed up.
If you have a total TWRP backup or an EFS backup, try to restore it.
If you still have no luck, your only option is Octoplus Box or such things.

Second hand phone right?

Mine is second hand phone, as well. 930S. Have had the same issue when I've flashed to 8+ ROM, and moving from no cell coverage area and then back into cell service area. I'm able to to a service search and it will find the towers and upon selection will connect back up.
If I flash to a different ROM, about same issue. As long as I remain in service area does fine. Skip out of the area and I may have to re-search.
I'v flashed different CSC's, no change really, except when I flash an AT&T CSC, then it seems to stay locked on a bit better, though with AT&T CSC I am unable to enter phone codes, so I went back to 'stock' (Korean phone Chinese regions). Stock has no CSC directory present in the root/system directory, which is interesting. I leave the Chinese regions unchecked and the phone finds local towers, US west coast, AT&T networks, T-Mobile, etc, just fine, overall. It's just on very weak signal or no signal that I may occasionally have to do a re-search when I'm back in a coverage area.
Your's sound much more a PITA.