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Help - Cm7 Update - G2x - No APN connection....

Hey Everyone,
Whenever I update to any version of cm7 and flash a new kernel with it I lose APN connectivity... I can't manually connect either. No 2g/4g nothing. Wifi is fine. I've tried multiple versions of cm7, etc. I don't have the same issue with Eagle 1.0.4 and/or Team Whiskey, flashing back to stock, etc. but anytime I try to check out CM7 I can't get it going! I figure it's something simple but does anyone have any ideas so I can try to get some OC going! Lol...
Thanks Everyone...

deadly1 said:
Hey Everyone,
Whenever I update to any version of cm7 and flash a new kernel with it I lose APN connectivity... I can't manually connect either. No 2g/4g nothing. Wifi is fine. I've tried multiple versions of cm7, etc. I don't have the same issue with Eagle 1.0.4 and/or Team Whiskey, flashing back to stock, etc. but anytime I try to check out CM7 I can't get it going! I figure it's something simple but does anyone have any ideas so I can try to get some OC going! Lol...
Thanks Everyone...
Click to expand...
Click to collapse
FYI: wrong forum.. Be ready for some people to be mean to you. Just a heads-up.. lol

Sorry I'd more than happily move it. I'm completely new really to posting here obviously but been lurking for a while now. Don't mean to be a complete noob lol

deadly1 said:
Sorry I'd more than happily move it. I'm completely new really to posting here obviously but been lurking for a while now. Don't mean to be a complete noob lol
Click to expand...
Click to collapse
It's already been reported. A mod will move it shortly. Next time post in the Q&A section. This area is for Development only...hence the name.

Try it without the kernel.
- BFL

I've been recently having the same problem.

Not a problem, this was a question concerning development and more or less the roms I'm downloading from this section hence I posted it here... won't happen again.
As for flashing w/out the kernel, I thought you needed another kernel to run cm7 with? I'm trying to overclock basically which I can't do on the stock kernel either.... so I'm not really sure what to do but I'll see if I can flash back to gingerbread, get my data going and flash back to cm7 w/out using any new kernel... have to make sure the rom doesn't autoinstall the new kernel either when you flash the rom

Update the apn settings for t-mobile. You can find them online just by looking them up. Try that.
-Insert signature here-

twitch153 said:
Update the apn settings for t-mobile. You can find them online just by looking them up. Try that.
-Insert signature here-
Click to expand...
Click to collapse
Give me a few I'll try to manually add them as an apn. thanks!

deadly1 said:
Give me a few I'll try to manually add them as an apn. thanks!
Click to expand...
Click to collapse
What works for me is a hard reboot. Hold volume up and power for 8 seconds. Apn should be there when you boot back up (usually). I have this issue with stock and any other kernel
Sent from my LG-P999 using XDA App

SOLVED!
I had the exact same issue and fixed it by installing the SIM card that came in the GX2 box.
I had been using my Nexus One SIM up to that point. The T-Mobile customer service rep told me that the G2X needed the updated SIM card and that without it, there would be data issues when not on Wi-Fi.
Write the SIM card information down before installing it in the G2X and calling T-Mobile (or whoever is your service provider) b/c they need the serial number in order to properly provision the phone.

Apothegm said:
What works for me is a hard reboot. Hold volume up and power for 8 seconds. Apn should be there when you boot back up (usually). I have this issue with stock and any other kernel
Sent from my LG-P999 using XDA App
Click to expand...
Click to collapse
Worked like a charm!!! Thank you!!
Simple yet effective lol
Finally up and running on cm7 with no apparent issues to report!

Also I found out that going into settings,into the apn settings,pressing menu then reset to default seem to kick it outta limbo

Great info everyone, thanks!
I'm still working on getting the market up and running on cm7, but otherwise everything is running really clean!

Thread moved to proper forum.

I have the same issue, and only on CM7..
Other Stock roms work OK for 3G
I have 2 sims - one uses regular APN setting (supplied from simcard) the other one is manual
The one that uses default (simcard) apn worked once after first install..
Than doesnt work..
VOL up + power didnt do the trick..
Whenever I put the custom APN simcard, it doesnt apply the settings..
Very weird..

I'm using the SIM out of my G2x box. Maybe it helps a little but it still happens when coming from a reboot, wifi, or airplane mode.
When you go to Mobile Networks, it won't connect to any of the listed networks.
This is already known and discussed, but to put a solution to this thread:
Go into Mobile network.
Let it scan
Select ANY network, it will error
Select Automatic until it reconnects again
Done.
Once it reconnects, you should be able to go into APN settings and see "Simple" and "T-Mobile". Sometimes if you can you select "Simple" then select "Tmobile" again, it speeds things up.
Works EVERY time. Sucks it requires this most of the time but it only takes a second and will stay connected for as long as the phone is turned on.

Hard reset (VolUP+Power) didnt work..
Is it a problem with their firmware?
I require custom APN's on my Network operator -- stock (or eagle blood/team bionics) work great, but CM7 doesnt for some reason..
Cant figure out why..
Even 7.1 RC0

.me said:
Hard reset (VolUP+Power) didnt work..
Is it a problem with their firmware?
I require custom APN's on my Network operator -- stock (or eagle blood/team bionics) work great, but CM7 doesnt for some reason..
Cant figure out why..
Even 7.1 RC0
Click to expand...
Click to collapse
APN's won't stick until you do what I said above. Once you disconnected and reconnect, APN's should pop up. If you created your own APN, it should THEN be displayed.
Even customs APN's won't be displayed until you disconnect/reconnect using the methods above.

player911 said:
I'm using the SIM out of my G2x box. Maybe it helps a little but it still happens when coming from a reboot, wifi, or airplane mode.
When you go to Mobile Networks, it won't connect to any of the listed networks.
This is already known and discussed, but to put a solution to this thread:
Go into Mobile network.
Let it scan
Select ANY network, it will error
Select Automatic until it reconnects again
Done.
Once it reconnects, you should be able to go into APN settings and see "Simple" and "T-Mobile". Sometimes if you can you select "Simple" then select "Tmobile" again, it speeds things up.
Works EVERY time. Sucks it requires this most of the time but it only takes a second and will stay connected for as long as the phone is turned on.
Click to expand...
Click to collapse
I feel like we're missing a step here. There isn't anything to select, unless you go under Network Operators or Access Point Names. APN is blank for me, so i can't select anything, and doing anything under Network operators doesn't work...

Nexus S 4g PRL and Profile update fail??

Whenever I try to do the PRL or Profile update it always says failed try again.
Has anyone else experienced this issue or would run the update to see what happens?

ryandoubleu said:
Whenever I try to do the PRL or Profile update it always says failed try again.
Has anyone else experienced this issue or would run the update to see what happens?
Click to expand...
Click to collapse
I ran PRL update a few times today and it was successful each every time..

thanks...
styckx said:
I ran PRL update a few times today and it was successful each every time..
Click to expand...
Click to collapse
thanks... It must be my phone then, I will go swap it out tomorrow

To anyone who has experienced this problem i found a fix that works, For some reason or a other during the sprint activation, some MSID numbers become corrupted..DONT ASK ME HOW..But this is directly related to the problem. I even noticed mine was even deleted.
*Call sprint and request a new 1. they will guide u though the set up..
FYI most sprint reps dont realize that the ## codes are different because all they do is read a script.. remember USE *#*#_____#*#*
This will allow your profile to update and your prl to update
Sprint does not offer much support for the nexus
THIS fixed mine and almost positive it will fix yours..If you get a Stupid rep hang up call back..

What I've done is enter *#*#4636#*#*. Change your phone information to CDMA only. Press home key otherwise it will switch back to WCDMA preferred. Try updating your PRL and profile. Go ahead and change it back to WCMDA preferred. I've had success every time I've done this. I hope this helps.

I had to move to an area with 2 bar signal (rather than just 1 bar) to get it to work.

I've got a nexus s4g and it fails every time for profile and PRL, running stock Odexed but rooted rom. Yesterday i unrooted and reOEM locked. Flashed the original oldest rom and let it do the OTA updates. Still can't update PRL or profile =((

ive had seven nexus s 4g's and they have all had this problem.
also, regardless of how you exit the info screen, it will always revert back to wcdma preferred.

tailsthecat3 said:
ive had seven nexus s 4g's and they have all had this problem.
also, regardless of how you exit the info screen, it will always revert back to wcdma preferred.
Click to expand...
Click to collapse
Wrong. Using the above mentioned method I successfully switched to CDMA Only and was able to update the PRL and Profile. When I went back into the menu it was still on CDMA Only so I switched back to WCDMA Preferred (as per the instructions). It has made a PHENOMENAL difference in 3G speeds. (It would literally take minutes to see the Market screen or search for anything, and downloads would be around 100kbps)

zeroxg4 said:
Wrong. Using the above mentioned method I successfully switched to CDMA Only and was able to update the PRL and Profile. When I went back into the menu it was still on CDMA Only so I switched back to WCDMA Preferred (as per the instructions). It has made a PHENOMENAL difference in 3G speeds. (It would literally take minutes to see the Market screen or search for anything, and downloads would be around 100kbps)
Click to expand...
Click to collapse
The settings don't stick.
Sent from my Nexus S 4G via XDA Premium

I just did a return to stock and wasn't able to update my PRL or Profile either. Thanks for the tip about *#*#4636#*#*. I didn't even need to change the mode, as soon as I got to that screen, I hit the 'Ping Test' button (can't remember the exact name). As soon as I did that, the 3G Data and Signal Strength indicators turned from white to green (I'm new to the android, not sure what exactly that means), and it immediately updated and started downloading a software update.

Interesting. I have previously been able to update these but recently I have been unable to and would get some weird popping sound from my speaker. I went in, ran the ping test, set to cdma only(mine has been saying unknown), pressed home, went into settings and was able to successfully update!

I had the iissue where I could update and profile or Orlando immediately after rooting.
I had to get my msl. *#*#msl#*#*
I tried many methods but I would up I putting my phone number in for my number and my msid. Then after that it rebooted. I went immediately to update my profile and prl and it worked and had worked since then.
I tried many many different ways. I input my msid and my number and nothing worked. It only wokred for me after I put my number in the number and msid slots. Very odd.

[Q] Different Roms, Different Radios, Same Problem

Background:
I'm on AT&T, Unlimited Data.
I've had my Inspire 4G for about 4 months and for the most part I have been running Leedroid. Recently, I've been having trouble with not being able to make calls, but able to receive calls and use data. When I try to make a call it drops immediately. As soon as I press Call, it flashes to "Call Ended".
I thought that a clean wipe and flash would solve the problem and I've also made sure that I'm running the correct radio (Suggested radio) and matching RIL.
Neither of these ideas fixed my problem, so I flashed CM 7.1.0-RC1 and again checked the radio firmware and RIL. No dice. I've tried to search around the forums to make sure I wasn't overlooking something obvious, but I haven't found anything.
Also, I do have a good signal when I'm attempting to make a call. It seems to only happen in one part of town and I'm wondering if it's something to do with this part of the network. Sometimes if I cycle the radio on and off using airplane mode it will work long enough to make one call. Sometimes if I go into the Settings > Wireless and Network > Mobile Networks > Network Operators > and press Select Automatically, It re-registers on the network and all is fine for about 30 minutes.
Side note: My data speeds have dropped from 4000kbps to about 700kbps.
Current info:
Android 2.3.4
Baseband 15.54.60.25U_26.09.04.11_M2
Kernel 2.6.35.13-cyanogenmod-g87a2eba
If anyone has run into this problem or has a suggestion I would really appreciate it. Thanks in advance.

Noobixide said:
Background:
I'm on AT&T, Unlimited Data.
I've had my Inspire 4G for about 4 months and for the most part I have been running Leedroid. Recently, I've been having trouble with not being able to make calls, but able to receive calls and use data. When I try to make a call it drops immediately. As soon as I press Call, it flashes to "Call Ended".
I thought that a clean wipe and flash would solve the problem and I've also made sure that I'm running the correct radio (Suggested radio) and matching RIL.
Neither of these ideas fixed my problem, so I flashed CM 7.1.0-RC1 and again checked the radio firmware and RIL. No dice. I've tried to search around the forums to make sure I wasn't overlooking something obvious, but I haven't found anything.
Also, I do have a good signal when I'm attempting to make a call. It seems to only happen in one part of town and I'm wondering if it's something to do with this part of the network. Sometimes if I cycle the radio on and off using airplane mode it will work long enough to make one call. Sometimes if I go into the Settings > Wireless and Network > Mobile Networks > Network Operators > and press Select Automatically, It re-registers on the network and all is fine for about 30 minutes.
Side note: My data speeds have dropped from 4000kbps to about 700kbps.
Current info:
Android 2.3.4
Baseband 15.54.60.25U_26.09.04.11_M2
Kernel 2.6.35.13-cyanogenmod-g87a2eba
If anyone has run into this problem or has a suggestion I would really appreciate it. Thanks in advance.
Click to expand...
Click to collapse
Data can be different at different times at&t is notorious for that. its odd that it only happens in one part if town, that leads me to think that it has to do with towers and signal.
If it was happening all the time, I would think different, but it only happening in one part of town, and it only recently happening, thats signs of tower/ signal issues I would think.
Sent from my Inspire 4G using xda premium

I feel the same way. I'm going to run an experiment today. Using Open Signal Maps, I'm going to note the tower that I'm connected to when I start having problems. Then, I will drive a distance away until I have connected to another tower and see if that resolves the problem. Otherwise, I'm still stumped.

Noobixide said:
Background:
I'm on AT&T, Unlimited Data.
I've had my Inspire 4G for about 4 months and for the most part I have been running Leedroid. Recently, I've been having trouble with not being able to make calls, but able to receive calls and use data. When I try to make a call it drops immediately. As soon as I press Call, it flashes to "Call Ended".
I thought that a clean wipe and flash would solve the problem and I've also made sure that I'm running the correct radio (Suggested radio) and matching RIL.
Neither of these ideas fixed my problem, so I flashed CM 7.1.0-RC1 and again checked the radio firmware and RIL. No dice. I've tried to search around the forums to make sure I wasn't overlooking something obvious, but I haven't found anything.
Also, I do have a good signal when I'm attempting to make a call. It seems to only happen in one part of town and I'm wondering if it's something to do with this part of the network. Sometimes if I cycle the radio on and off using airplane mode it will work long enough to make one call. Sometimes if I go into the Settings > Wireless and Network > Mobile Networks > Network Operators > and press Select Automatically, It re-registers on the network and all is fine for about 30 minutes.
Side note: My data speeds have dropped from 4000kbps to about 700kbps.
Current info:
Android 2.3.4
Baseband 15.54.60.25U_26.09.04.11_M2
Kernel 2.6.35.13-cyanogenmod-g87a2eba
If anyone has run into this problem or has a suggestion I would really appreciate it. Thanks in advance.
Click to expand...
Click to collapse
I was having the same problem, more so with data then calls. I too am running leedroid however I tried his recommended radio and noticed a huuuuuge different in dl speeds. I tried waiting a day but couldn't do it. I flashed the stock radio and ril and everything is back to normal from what I can tell. Try that and see if that helps

shackman716 said:
I was having the same problem, more so with data then calls. I too am running leedroid however I tried his recommended radio and noticed a huuuuuge different in dl speeds. I tried waiting a day but couldn't do it. I flashed the stock radio and ril and everything is back to normal from what I can tell. Try that and see if that helps
Click to expand...
Click to collapse
Yeah, I've tried that. Didn't work. Thanks though.

Just for grins, you could try a different radio. 26.09.04.11 was never released on the Inspire nor the AT&T network. Keep in mind that Lee is overseas in the UK using another network provider, so I would take his recommended radio with a grain of salt. If I were you, I would try 26.06.06.30 or 26.10.04.03. If you're using a Sense ROM, then use RIL 2.2.0160HM with it. If you're using CM7.1.0-RC1 or a newer nightly, then stick with the default RIL (2.2.0018G) because it's tuned for AOSP ROMs and is known to work very well with all stock Inspire radios.
Regarding your poor data speeds, be sure to reconfigure your custom ROM to use the stock APN settings. No custom ROM on this forum (except for those heavily based on the stock ROM) comes with the true proper stock APN settings that are needed for full speeds in some markets. Link to the APN settings is here.

[Q] 4G Connection Issues (Haven't Lost WiMax Keys)

Hello. After lots of rooting, ROM flashing, and all that good stuff, somewhere in the process I did something that must be keeping me from using 4G. When I turn on my 4G antenna, in settings it just says I'm "Disconnected" and when I scan for service, it scans for maybe five seconds and goes back to disconnected. In the settings, all three fields for 4G network information (Network provider, Signal strength, and IP address), are blank.
I used wimax_mtd and ls /data/misc/wimax/ to make sure I still had my keys, and I do, they match what's written on the back of the phone exactly. I tried this with no luck.
Anyone know what is causing the problem? I'm running a fully rooted gingerbread.

Whitellama said:
Hello. After lots of rooting, ROM flashing, and all that good stuff, somewhere in the process I did something that must be keeping me from using 4G. When I turn on my 4G antenna, in settings it just says I'm "Disconnected" and when I scan for service, it scans for maybe five seconds and goes back to disconnected. In the settings, all three fields for 4G network information (Network provider, Signal strength, and IP address), are blank.
I used wimax_mtd and ls /data/misc/wimax/ to make sure I still had my keys, and I do, they match what's written on the back of the phone exactly. I tried this with no luck.
Anyone know what is causing the problem? I'm running a fully rooted gingerbread.
Click to expand...
Click to collapse
What rom/version? What provider? What troubleshooting steps have you taken?

Sprint. The ROM is just a rooted version of Gingerbread (2.3.3). The software number is 2.76.651.4. Troubleshooting? I don't even know what you're asking there. I have my keys, I've confirmed that. I tried one thing from the thread I linked. I can't connect. What else am I supposed to try?

Whitellama said:
Sprint. The ROM is just a rooted version of Gingerbread (2.3.3). The software number is 2.76.651.4. Troubleshooting? I don't even know what you're asking there. I have my keys, I've confirmed that. I tried one thing from the thread I linked. I can't connect. What else am I supposed to try?
Click to expand...
Click to collapse
Flash the new radio/wimax radio, update profile/prl/twice/reboot twice, tweak ##DATA# settings.
Read the Wiki here:
http://forum.xda-developers.com/wiki/index.php?title=HTC_Speedy
And search around the forum.

Whitellama said:
Hello. After lots of rooting, ROM flashing, and all that good stuff, somewhere in the process I did something that must be keeping me from using 4G. When I turn on my 4G antenna, in settings it just says I'm "Disconnected" and when I scan for service, it scans for maybe five seconds and goes back to disconnected. In the settings, all three fields for 4G network information (Network provider, Signal strength, and IP address), are blank.
I used wimax_mtd and ls /data/misc/wimax/ to make sure I still had my keys, and I do, they match what's written on the back of the phone exactly. I tried this with no luck.
Anyone know what is causing the problem? I'm running a fully rooted gingerbread.
Click to expand...
Click to collapse
Unless your actually connected Network provider, Signal strength, and IP addresswill appear blank when you look in settings. If you've confirmed you have your keys, and are in a 4G zone. Then you can try a simple trick that sometimes works. Put the phone in Airplane mode for a few minutes. Then take it out of Airplane mode, and try to connect to 4G. If that doesn't work then go ahead and update the radios as VICODAN said. That should solve the issue.

Still no luck
I just tried all of those steps, besides the airplane mode one, with no luck, but I'm trying the airplane mode idea right now, and if that doesn't work, I'll elaborate.
EDIT:
Okay, no luck.
So I went through and flashed the newest radio and the wimax radio, and in the process I realized that I didn't actually have the newest radios beforehand. (I also learned that I hadn't yet formatted my microSD card to FAT32, so it's good that I realized that too. ) After that, I went into System Uupdates and updated Profile and PLR, then I rebooted, and I did it again, and I rebooted. You said to do it twice, so that's why, but you said twice twice so I wasn't sure which part to do twice. (Wow, that was a mouthful.)
After all of that, I tried the airplane more thing, with no success. I've connected to 4G in the past here, and the spring website even says my area has 4G coverage, so I know that's not the issue.
Also, about the tweaking ##DATA# settings, I mentioned that I tweaked it according to the link I put in the original post, but is there anything else I should try?
Thanks for the suggestions so far.

Whitellama said:
I just tried all of those steps, besides the airplane mode one, with no luck, but I'm trying the airplane mode idea right now, and if that doesn't work, I'll elaborate.
EDIT:
Okay, no luck.
So I went through and flashed the newest radio and the wimax radio, and in the process I realized that I didn't actually have the newest radios beforehand. (I also learned that I hadn't yet formatted my microSD card to FAT32, so it's good that I realized that too. ) After that, I went into System Uupdates and updated Profile and PLR, then I rebooted, and I did it again, and I rebooted. You said to do it twice, so that's why, but you said twice twice so I wasn't sure which part to do twice. (Wow, that was a mouthful.)
After all of that, I tried the airplane more thing, with no success. I've connected to 4G in the past here, and the spring website even says my area has 4G coverage, so I know that's not the issue.
Also, about the tweaking ##DATA# settings, I mentioned that I tweaked it according to the link I put in the original post, but is there anything else I should try?
Thanks for the suggestions so far.
Click to expand...
Click to collapse
Last thing to try is ##rtn#, wipes fone and resets to factory defaults, then do hands free activation.
Also make sure your [email protected] stuff is configured properly. This is also somewhere in ##DATA# settings.
You can also try flashing a different rom like CM7
But before you do that call sprint tech support and tell them to fix it. They might be able to do something on their side.

Okay thanks, I'll call them later today.
Sent from my PG06100 using XDA App

So I called, the woman had me do a few things, and after hitting restore from the menu in ##DATA#, the 4G is behaving differently. Instead of scanning and returning to disconnectec, it now goes to "turning on ..." Then to "turning off ..." And back to on again. It cycles forever, until I manually turn it off.
Sent from my PG06100 using XDA App

Well it sounds like something is still wrong. Try flashing a different Rom to rule that out. If that doesn't work, and having WiMax is a must. Then you may want to think about running an RUU back to 2.2 stock. Then just start the whole root process all over.

[Q] Not registered on the network problems

I've read a lot on the internet but have not found a good answer for me. In certain locations, almost daily, I get either a "not registered on the network" message or a "sim not allowed ##3" message on my Infuse. If I switch the phone to airplane mode and then back off of airplane mode it always reconnects to the AT&T network. The problem started after I changed my ROM from Infused 1.5.3 to Zeus 6. I've flashed to Mind of Mac 1.4 but that didn't fix the problem. I've tried a new SIM card, different APN settings and several other changes, but it didn't help. If I have a good 4g connection it never has the problem. It never re-registers on the network until I do the airplane mode on and off thing or reboot the phone. My iemi number shows up weird on the phone too. What is the best way to fix this problem? Thanks.

No one has a clue?
No one has a clue how to fix the problem? It happens when I lose 3g or 4g connection.

What modem do you have?
Sent from my A500 using xda premium

Modem
I currently have UCLB3. I have tried a few different ones but it does the same thing with each one I've tried.

Sounds like you know what you are doing , unfortunately it sounds like a hardware issue. If going to settings > mobile networks > network operators and choosing AT&T does not fix it the only thing to suggest is return for repair or exchange. As you know, you will have to return it to stock so after you do that you may want to test it one more time. Sorry, not the answer you wanted but the best answer I have, Regards.

The following were found by googling "Samsung infuse imei"
http://forum.xda-developers.com/showthread.php?t=1726149
http://forum.xda-developers.com/showthread.php?t=1729838
Idk if those will help...but maybe if you restore your imei so its no longer weird your problem will be fixed...
Sent from my HTC Holiday using Tapatalk 2

mg2195 said:
The following were found by googling "Samsung infuse imei"
http://forum.xda-developers.com/showthread.php?t=1726149
http://forum.xda-developers.com/showthread.php?t=1729838
Idk if those will help...but maybe if you restore your imei so its no longer weird your problem will be fixed...
Sent from my HTC Holiday using Tapatalk 2
Click to expand...
Click to collapse
From recent experience - I would avoid using the fixes listed above as they will change your IMEI.
I say this as I was having a similar issue -- I had been running on the ParanoidAndroid ICS rom for a few days and my I997 started to do the same thing. Network connection was fine most of the time but it would occasionally drop out to no network. Except swapping between airplane mode didnt always fix it. If i rebooted the phone and it would pop up with "Unknown" Baseband Version, and no IMEI/IME SV until it connected again... whenever it decided to do so.
I flashed a few different modems to no avail.
Used GTG's stock restore... and it still showed no baseband or IMEI.
Searched through everything i could find and I found the 2 above posts. Being the cautious person that I am, I was skeptical to run the "fix" since I know playing with the efs folder can do.. fun things.. I backed it up with EFS Pro.
http://forum.xda-developers.com/showthread.php?t=1308546
So after that - I did the fix from those two posts. It worked. I got a signal. HUZZAH. But I could only make a few calls before it would drop out, and I couldn't send or receive text messages at all they would just stall and error out.
So I took a look at the IMEI again and noticed that it was NOT *my* IMEI, it was presumably the imei of the person who Truckerglenn got the backup from so long ago.
Figured at this point my phone is going to have to go back to Samsung to fix since it's still dropping out, the IMEI is wrong and I can't send texts
Can't break it anymore than it's already broken right?
Go back into root browser, delete the EFS folder entirely. *poof* gone. Reboot. Use EFS Pro to restore the backup I had created (GOOD THING!) phone reboots. Instantly picks up the signal again, I get 15 text messages, 2 voicemails AND my IMEI shows what it should be now.
*HOPEFULLY* it holds onto its connection now. If not, back to stock and back to samsung it goes - now with the correct IMEI. heh
Sorry for the long story

Thanks! May have found a partial fix.
Thanks for the tips and information. I think I may have found a partial fix. It seems that picking the "WCMDA only" in the "Network Mode" options seems to solve the problem for me. If it is set on "GSM/WCCMA (auto mode)" option, it seems to cause the "SIM not allowed ##3" or the "not registered on the network" problem when I am in an area where the 4G or 3G signal is weak. I will do some more testing. It appears that if I don't have 3G or 4G available in any given location my phone won't connect to the cell towers at all even though other users can connect without any problems. Does this give anyone any other ideas? Do I possibly just need new APN settings?

Have you tried flashing a new radio? Does a complete wipe and restore to UCLB3 make any difference?
Has any of these roms/firmwares that you flashed been done so through Aroma installer? I know Aroma gives you the option to change modems, and if your download was buggered that could have caused it.
I'm just tossing ideas around here... I'm up early and looking to help.

The work around works
Yes, I have flashed the radio but that didn't help. I have discovered the "fix" is to set my phone on "WCDMA only". It seems that the phone will only work if 4G or 3G is available. I am not longer getting the original error messages. So that's a good thing. If I ever go to where 3G and/or 4G is not available I will have to try something else. Thanks for all the replies.