I purchased a G3 (T-Mobile) phone off craigslist (probably not the smartest idea) and I noticed the phone would not get LTE at all. It only gets 3g/4g and drops calls really bad (generally just goes to dead air, but doesn't actually drop the call). The previous owner unlocked the SIM and was already rooted. Since the SIM was unlocked, I tried a AT&T SIM card from a friends phone while at a location with LTE and the phone still wouldn't get LTE. I forced to phone to use LTE only and it just wouldn't get any service at all. I also searched around on here to find any tips/tricks/solutions, and everything I found didn't work. The phone was still under the manufacturer's warranty and I did send it to LG, but since the phone was "modified", they won't touch it at all. They couldn't even tell me if this was a physical hardware issue or was due to the SIM being unlocked or anything else for that matter. I tried multiple ROMs as well and same issue. I have tried the factory rooted ROM from XDA as well. Does this seem like it's a physical defect of the radio or something due to the SIM being locked and/or being rooted (though I don't think it being rooted would create this issue)? If I can't get it fixed, then I'm basically stuck with a phone that I just purchased that has a janky radio and out $340.00. Any tips or ideas I could try or just point me in the right direction would be greatly appreciated.
Related
My original thread has not been moved from the old forum, so I'm just going to link it here:
http://forum.xda-developers.com/showthread.php?t=1757711&highlight=not+allowed+by+sim
Anyway, someone on HoFo posted that if you change your APN to non-LTE, the problem goes away. I did that yesterday and so far I haven't seen the error. However, my coworker did the same thing on his S3 and still got the error. This issue is specific to Rogers network, as other people used their unlocked Rogers S3 on other carriers and did not see the error, but once they put in Rogers SIM back in, it was back. I wish Rogers would get off their ass and fix it!
This happens also on Telus. Not sure if I've done this APN trick, but I have HSPA locked and the modem locked on 850mHz through the service menu *#2263#, and I still get this error sometimes.
a quick flight mode toggle always fixes it.
dektoud said:
a quick flight mode toggle always fixes it.
Click to expand...
Click to collapse
Yeah, same here. It's just annoying when you're in a hurry and need to make an urgent phone call.
Not sure if this helps but I sell cell phones and a memo was released by rogers stating its a error in the firmware and that when rogers reception drops or its out of range it will say this, instead of showing no signal. Its states rogers and samsung are working on a fix for it. Its probably more noticeable on the rogers network than others because they are currently working on expanding there network in most of Canada therefore its probably causing signal drops every now and then.
Sent from my SGH-I747M using xda app-developers app
still having this issue after OTA update
TELUS
Sorry to resurrect an old thread but I purchased an unlocked S3 about 3 weeks ago and I just got this error today. I was not able to make any phone calls until I used the flight mode trick. I thought this problem had been fixed? I'm with fido so it's part of the Rogers family.
Does anyone else still experience this issue?
haven't had this error since the last time i posted which was September
although i find it more often that my phone would lose reception in places or situations where before i would have reception, but just SIM error.
so my guess is that the phone hasn't yet reconnected to the network after losing reception (from underground parking etc) and before it was "showing" reception when it had none and came back with SIM error. now it just flats out says what's going on, which is no reception.
Hello, I am new to xda so please go easy on me. I have been in the wireless industry for over 10 years. I was mostly a Blackberry guy, but recently had to make the switch to Android. I would rate my knowledge of Android as just above average. Anyway, I bought a T-mobile Galaxy S3 from a guy and when we met up the phone worked just fine. When I got back to the house, the phone would not make phone calls, text, get on the internet or anything. When you try to make calls, it says "Not registered on the network". I started to do some troubleshooting and found out that the phone will work fine when on UMTS, but not when on GSM. Examining the phone, I noticed that there was a scratch on the back housing where the GSM antenna is, so I ordered a new back housing. Even after installing the new back housing, the same problem exists. I thought maybe that the phone was possibly stolen and for some reason only blocked on GSM signal. So I called T-mobile and they said that the phone is not listed as blacklisted. Not sure what else could be the problem. The person that had the phone before me unlocked it and used it on att. Of course he says there were no problems before and will not refund. Please let me know if there is anything further I can do to try to fix this phone as I do not want an expensive paperweight. Thank you in advance for your help.
Brian Scasta
Can u check and see if you have an IMEI number showing when you dial the code *#06#? You should see a 15 digit number. I had a similar problem where I could only get 2g signal. When I checked my imei it had disappeared. Luckily I had a backup available.
Sent from my SGH-T999
Might want to also check Settings>More>Mobile Networks>Network Mode and tick it to GSM/WCDMA Preferred.
And finally, since he was using it on AT&T, you might need to check the APNs and make sure they are on TMobile's and not AT&T. If not, then you can manually put them in there (don't forget to hit save when done).
The APN settings are correct, the network mode settings are set to gsm,wcdma,lte. If I go to network operators and search, ATT will be the only network that pops up when I am in GSM area. I have hard reset the phone several times. I don't know anyone with ATT or I would try their sim card in there. My sim card works in other phones. I have reset the APN settings as well. Is there a possibility that they messed something up when they unlocked the phone to be used on ATT? The IMEI does display when I do the *#06# thing. I do appreciate you guys helping me out.
Thank you,
Brian Scasta
same issue
I'm having the same issue with my tmobile phone. I bought an s3 a few weeks ago and it had been working fine up until a few days ago when the signal dropped entirely. The same error appears - "not registered on network." At first I thought it was a rom I had installd but after flashing several roms I know this isn't the problem. I've tried searching for network operators, etc but still get the same error.
Any suggestions?
Hey all,
Bought a used Note II last week in a parking lot deal. Seller said WiFi is not working, which proved to be true, but that everything else is fine... not true. Phone seemed to work with my SIM, so we sealed the deal.
Since then, the phone never left Edge (2G), even in areas where I should be getting LTE. I've managed to update to rooted 4.3 via Odin (phone showed as "Modified" and therefore wouldn't OTA update from 4.1.1). I've also swapped SIMs and APNs with no move out of Edge.
Any ideas?
Thanks in advance...
Bump?
You are with a Canadian carrier? Some carriers will require you to flash a modem that matches your carrier.
Okay, here's the problem. Since June 3rd my phone will not stay connected to 4g. I toggle airplane mode and I instantly lock on to 4g. Signalcheck reads between -109 and -115. This is normal for me at home. Until the 3rd I could hold that lte 1900mhz (band 25) and never drop it unless i went further into my home. I almost never get band 41 unless Im closer to a tower. Band 26 is nonexistant in Buffalo (too close to canada).
Since then I toggle airplane mode and can lock on to LTE 25 (same signal strengths) but it drops to eHRPD 3g every single time.... Within 10-15 seconds. Same happens when I reboot.
I am running full stock, stock recovery, ZVG, and the G2 is rooted.
I have tried:
Disabling band 26 and 41. And connecting to any combination of them on/off.
Modifying the bsr timer, etc.
Updating prl, profile, and even reactivation many many times.
Factory reset on ZVG, 3x.
Full TOT back to ZVE, unrooted. (Still same problem even on ZVE, unrooted and yes I never had this issue on ZVE before updating to ZVG the first time.)
Redownloaded ZVG and reinstall after TOT, no improvement.
Called sprint and have been working with engineers in Oklahoma city office. They swear up an down its not a tower issue, or a eCSFB problem.
I have the same problem even away from my home towers.
I have opened the device to inspect for damage, or moisture, there is none I can see.
I havent dropped it hard, or exposed it to any water that I can think of.
So anyone have any ideas on what I should try next, or do to get my 4g to stick?
Im a bit at a loss. Ive tried every setting, trick, or troubleshooting step I can think of.
Thanks in advance for any help or knowledge you can provide.
For anyone that may have a problem like this in the future I solved my issues by having sprint send me a new sim card. Being that I bought my g2 the day it was released I guess maybe my sim went bad. It was a long shot and my last ditch effort to get 4g back. I now have a steady 4g signal.
Thanks for posting what fixed it for you. I've also been having this same problem for about the last 2 weeks. It just won't hold LTE. I'll stop by my local Sprint store today for a new sim and hopefully that does the trick for me as well.
Unfortunately even with the new sim card the problem returned after a few days. I called Sprint and asked them to put in a dummy sim number to unregister the sim, and then re-add the sim back. It fixed the problem immediately once again.
Frankly, I dont understand what the problem is. I know its related to the sim card but I havent reset (powered down) my phone in a week. Im kinda worried the problem will come back if I do. Cant see it being a bad sim reader in the phone. Otherwise it wouldnt start working on 4g again after resetting it via sprint.
Im stumped.
I can always call sprint and have them reset the sim again but Id rather know if its some kind of bug that will be fixed. I contacted LG and they acted like I am outta my mind.
I have the LG E980 Optimus G Pro POS phone. Had it unlocked, inserted a cricket sim card and though I can sometimes make calls when it decides to connect, I very rarely get 4G or LTE, mostly its a little "E" with one or two bars of signal. The phone will not send photos but surfs the web on wifi with no issues.
I have read through this forum and found some workarounds with StraightTalk users but can't find anything for Cricket users. I have tried creating an APN with Crickets data but the Authentication Type is restricted from any editing leading me to believe that this phone is locked to AT&T's network regardless of what unlock codes I entered successfully.
When I attempt to make outbound calls the phone usually takes 3-4 attempts as it drops the call and forces me to redial eventually after enough tries it connects but the quality of the call suks monkey nutz.
I don't really know if rooting will help. I did try a workaround straight talk users were having success with where the APN was edited with the SIM card removed but even that was fruitless as the AT&T APN kept showing up over and over again once I reinserted a SIM card.
This phone is slated for air to wall impact testing very soon if this waste of money can't be fixed and my thoughts that AT&T locked this junk down turn out to be true. So if anyone is knowledgeable with Cricket networks using this phone any guidance is appreciated and in advance I humbly bow to your expertise in these matters. THANK YOU.
I use the phone on Cricket network and have had nothing but superb service, I had service with AT&T. I ordered my sim off ebay for Cricket inserted it went through the setup and all is fine. only thing I can think of is your phone is not unlocked... Mine is carrier and boot loader unlocked and rooted, only problem I had was I couldn't send picture mess... spot where you add the APN type was blanked out, that was on stock 4.4.2 I just went with a modded version of 4.4.2 and all is fine... blows att out of the water full bars lte all the time, Hope you get it figured out.. sure glad I switched....
U really dont need a unlocked att phone to use on cricket
Locked att phones work fine too
Cricket runs on the att network and is owned by att
I switched my s4 from att to cricket without unlocking
The cricket salesman also said any att phone would work since its the same network
You must have a diferent issue
I use my att e980 on cricket at this moment
Bought it off ebay and very happy with it
Sent from my LG-E980 using Tapatalk