Database Users

MyTouch 3G 1.2 - No Service

I have a MyTouch 3G w/3.5mm headphone jack that I bought from Craigslist. I just use T-Mobile ToGo Prepaid, so I had to get the phone unlocked (got unlock code through T-Mobile for free) and I used my mom's AT&T SIM Card to activate the phone.
After doing that with stock firmware, my T-Mobile SIM card still won't work in the phone. I got zero bars and with a small "X". I thought maybe T-Mobile purposely blocked non data plan SIM cards in their stock ROM, so I rooted and installed Cyanogenmod 6 RC2. Everything went fine with the rooting and upgrade, but I'm still having the same problem with my T-Mobile SIM. It always says "No Service". If I try to dial a number, I get "Mobile network not available." In Settings->Mobile network settings->Network Operators, it shows both AT&T and T-Mobile as available networks. If I touch T-Mobile, I get "Unable to connect to this network at this time. Please try again later". The strange thing, is everything works fine with an AT&T SIM card! I'm at a loss to figure this out. Are these symptoms of a blacklisted IMEI? Or do these symptoms indicate something else?
UPDATE: Talked to T-Mobile chat, IMEI is NOT blocked which is good, but it's still not working.

had the same issue...I used my friend's AT&T sim with data plan to sign-in to google. I had to enter AT&T APN settings and choose AT&T network in the menu.
Everything went well and I put my prepaid togo sim card. Got no service message and no bars. I went then to menu-settings-wireless controls-mobile neworks-network operators. It scanned networks for a minute and found t-mobile which I chose. Right after that it connected to network and I was able to make my first call from prepaid card

Unfortunately, that doesn't work on mine. When I touch T-Mobile, I get "Unable to connect to this network at this time. Please try again later."

GnatGoSplat said:
Unfortunately, that doesn't work on mine. When I touch T-Mobile, I get "Unable to connect to this network at this time. Please try again later."
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Click to collapse
are you sure your t-mobile sim card still work fine? i did research quite a bit this issue yesterday and many people confirmed that prepaid card works fine for them. check your network settings again and reset them to default

Yeah, it's the SIM card I use in my iPhone daily. My wife's SIM doesn't work in it either. I've reset everything to defaults, wiped everything, and even installed Cynanogenmod with no luck.

GnatGoSplat said:
Yeah, it's the SIM card I use in my iPhone daily. My wife's SIM doesn't work in it either. I've reset everything to defaults, wiped everything, and even installed Cynanogenmod with no luck.
Click to expand...
Click to collapse
sorry to hear that...maybe you should try to call t-mobile or visit a store

I did talk to T-Mobile, but they only suggested a full wipe (hard reset) which didn't work. I guess it's probably broken, and since I bought it second-hand, not covered under warranty. It's unlocked so I guess I could try to recoup my losses by selling it to someone w/AT&T.

[Q] Galaxy Tab SIM card

Can any one tell me why my TAB will not recogize my valid, working SIM card from my other phone? Perhaps some setting on the TAB has to be changed?
Thanks for any info.

dude
dude i dont know. i tried the same thing. i have tmobile usa and the Galaxy Tab, along with my HTC HD2. tried the swap, no dice. saw my phone number, but would not txt, call, or receive calls. no data either.

My TAB doesn't even recognize when that the SIM is plugged in .
It keeps saying: "Please insert a SIM card". "Emergecy Calls Only".

This is going to sound really dumb but try shoving the SIM card in further. With certain brands of SIM you can get a "click" without the SIM being correctly seated in the tab. The tab will reboot if you insert a sim properly while it is on.

Problem solved! I thought that it was unlocked, but it wasn't. Followed Rothammer advise on unlocking and that worked like a charm.
Sent from my GT-P1000 using XDA App

I have the same problem with my SIM not being recognized. I have an AT&T Tab; unlocked [verified network is unlocked]; flashed with Rotohammer's most recent JME-Full; Baseband is I9000UGJK3; IMEI is OK; and Mobile Network is HSDPA. Interestingly, the signal strenth shows full bars, but does not recognize SIM and does not allow me to enter the Mobile Networks [grayed out] to change anything. I've tried every fix from every thread I can read here. Any thoughts anyone to get this to use voice and data?

Flash the Bell i900 modem for at&t tabs.

No Signal and unavailable network.

I have no signal and under the notifications bar It says "Selected network (T-mobile UK) is unavailable. So I thought let me change the sim, I did it still doesn't work. I checked and cleaned the sim card hole. Didn't work, I tried to set it manually under networks and select network, it didn't work also I checked my IMEI but my IMEI is still shown but my signal is -113dBm so what's the problem? I even flashed and factory reset to stock still the problem persists. Right now I'm using Kyrillos rom 10.5. Thanks in advanced.

Might sound stupid but try the Sim in another phone?

AzNTypeR said:
Might sound stupid but try the Sim in another phone?
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Click to collapse
I've tried 2 sims and they both work in another phone. Seems like it could be a faulty sim card slot. Guess it's time to throw out my G3 had it now for over a year.

Axon 7 Nougat Verizon - SIM issues!

I just "upgraded" to Android 7.0 today. My carrier is Verizon.
I'm not sure what's up with it or how to troubleshoot it, however I need my phone back up as soon as possible.
Any help would be greatly appreciated! This is kind of a big deal for me.
Under Dual Sim Settings->Network mode it says the following:
Card 1: LTE/WCDMA/GSM
Card 2: missing or error
However, it's not connected to Verizon's network at all.
I've tried popping the sim in and out, along with restarting the device.
edit:
A SOLUTION HAS BEEN FOUND
aijorgenson said:
I managed to get a hold of a friend's active AT&T phone. Put his sim into slot 1, rebooted and put the Verizon sim back into slot 1 once the AT&T sim was recognized.
This resolved my issue. I just did it so I don't know if it's a permanent fix or not.
Click to expand...
Click to collapse

I had to remove both my SIMs, put my GSM (T-Mobile) SIM in slot 1...wait for the phone to recognize the SIM...then reboot a few times...then turn it off...put my Verizon and T-Mobile SIMs in slot 1 and 2 respectively...and then reboot. It's worked fine ever since. An old, inactive GSM SIM or a friend's will work fine for this procedure.
But yeah lots of people are having this issue with Verizon SIMs after the update. Really annoying...but it does seem fixable in most cases.

flyer_andy said:
I had to remove both my SIMs, put my GSM (T-Mobile) SIM in slot 1...wait for the phone to recognize the SIM...then reboot a few times...then turn it off...put my Verizon and T-Mobile SIMs in slot 1 and 2 respectively...and then reboot. It's worked fine ever since. An old, inactive GSM SIM or a friend's will work fine for this procedure.
But yeah lots of people are having this issue with Verizon SIMs after the update. Really annoying...but it does seem fixable in most cases.
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Thanks, I have a friend with a GSM sim. I'll try this out tomorrow night.

@flyer_andy has helped me too with this problem. I had to buy a straight talk sim from Walmart for $50 to get this thing working. I had to do it because i updated on the way to work. Once got to work i had no phone :crying: lol

I had to use my sisters sim card. I turned off the phone, put hers in, once it saw T-Mobile, I took the SIM out while the phone was on, swapped and was good to go. Boots just fine with Verizon data.

I managed to get a hold of a friend's active AT&T phone. Put his sim into slot 1, rebooted and put the Verizon sim back into slot 1 once the AT&T sim was recognized.
This resolved my issue. I just did it so I don't know if it's a permanent fix or not.

Just had a similar issue, running dual SIM. My T Mobile SIM which I use for the mobile data lost its data connection and would not reconnect, showed full Signal but no data. I eventually had to swap the 1 and 2 positions and now it is working.

tolymatev said:
I had to buy a straight talk sim from Walmart for $50 to get this thing working.
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Click to collapse
I hope a phone came with it for that price.
I picked up a SimpleMobile (T-Mobile MVNO) SIM at Family Dollar for $1.
I also had the unexplained automatic reboots after installing B15 last night. It also wasn't recognizing the SIM. It wasn't even recognizing the GSM SIM. I did a couple factory resets and reboots with the GSM installed. I t looks like it needed the radio reset like back in the old A20 days. It eventually recognized the GSM SIM. I then switched out the PagePlus SIM, and added the Tracfone APN.
Everything I looked at seems to be working. Speedtest is showing 5.46 mbps down, but only 100 kpbs up. I think that's about normal for me.

pauldow said:
Everything I looked at seems to be working.
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I wrote too soon. I'm back to no service. I'm not sure when service disappeared
I tried putting in the GSM SIM and rebooting a few times.
I put my PagePlus SIM in my old Galaxy S4 to try to have that recognized on the network.
I powered off the Axon and replaced the SIM with the PagePlus one.
It starts up and shows No SIM card, then No Service, then Verizon Wireless for a few seconds, then back to No Service.
It looks like the problem I had when going to A29, but the solution to fix it then isn't working.
Edit:
I did a factory reset with the PagePlus SIM inserted. It came up with phone service. I had to add the TRACFONE.VZWENTP APN.
It then showed an LTE connection. I shut off Wifi, and it started to load a web page. It then stopped loading, and went back to No Service at the top.

pauldow said:
I wrote too soon. I'm back to no service. I'm not sure when service disappeared
I tried putting in the GSM SIM and rebooting a few times.
I put my PagePlus SIM in my old Galaxy S4 to try to have that recognized on the network.
I powered off the Axon and replaced the SIM with the PagePlus one.
It starts up and shows No SIM card, then No Service, then Verizon Wireless for a few seconds, then back to No Service.
It looks like the problem I had when going to A29, but the solution to fix it then isn't working.
Click to expand...
Click to collapse
Do you have a Verizon phone that you can stick your PP SIM into, to verify that the SIM correctly works?

i'm having similar data connectivity issues with my Axon 7 and at&t after the Nougat update. Axon 7 is rooted with B15, using 1-sim and a microSD, here's my issue description
-
day 1-3: 4G/LTE connection working, no data issues
day 3: 4G/LTE connection working, can connect to web pages, but could not connect to Google Play, Youtube,Google News and none of my 3 Exchange email accounts. Switch to Wifi and no issues connecting to any Google Play, Youtube,Google News and none of my 3 Exchange email accounts
day 4: Same issues as day 3, factory reset manually reinstall all apps, email accounts, etc. after a couple of reboots, could not connect to Google Play, Youtube,Google News and none of my 3 Exchange email accounts. tried Lineage OS and 4 hours after fully setup, problem is back. with Lineage OS, signal bars showed no signal with each connection attempt and after 30 seconds, connection timed out and signal bars would return.
Troubleshooting:
- swapped sims from two working devices into the Axon 7 and same no-connection/time-out connectivity issues with Google Play, Youtube,Google News and my 3 Exchange email accounts
- all 3 sims tested work in every device except the Axon 7
- at&t re-provisioned my account and confirmed there are not issues on their end.
i'm stumped. any suggestions would be appreciated. otherwise, i'm in my 14-day window and my have to return the device. thanks.

When the verizon sim is installed, is global mode an option under settings, network settings (not the 4636 menu)? If so, try that.

xtermmin said:
Do you have a Verizon phone that you can stick your PP SIM into, to verify that the SIM correctly works?
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Click to collapse
I should have been clearer. The PP SIM works fine with my old Galaxy S4. I miss a lot of incoming calls with it, but that isn't configuration related. It's always done that.
Thank you for the reply.

Can't recognize ATT sim either..

Pull the sim and factory reset, reset network settings also. Then put the sim in and keep factory resetting until it's recognized. Took 3 tries on my phone and 5 on my friends.
Sent from my ZTE A2017U using XDA-Developers Legacy app

Are you all able to use HD Voice & video calling with the native dialer on the Verizon network? Some phones have an option under settings called 'Advanced Calling'. This is where you can turn on HD Voice & Video Calling for Verizon.

G935U firmware with Verizon MVNO

Hi guys,
I bought the unlocked firmware phone back in December 2016. The phone is great, the problem is I am using EcoMobile MVNO. It's refusing to recognize the network with the MVNO's sim card. I've spent hours on the phone with them and they claim all is OK on their (and Verizon's) end.
The phone sort of works, so I've just been grinning and bearing it so far. Using 4G switcher, I can put it in CDMA only mode, in which case it connects to '123456' and I can receive and make calls, and receive texts, but have no internet. If I put it in full LTE/GSM/CDMA auto mode, it connects to LTE, so I have internet, but it claims I'm not connected to Verizon network and in fact it's not available. So in this mode I can't receive calls or texts. Can't send texts under any mode. I've done a full factory reset at the MVNO's behest, of course that did nothing. The phone seems to connect fine to Verizon's network if I borrow someone elses's Verizon sim. My MVNO sim also works in my wife's iPhone5 without a problem. So it really seems to come down to the firmware on the phone. I'm holding out against hope that when Nougat comes to the G935U firmware, this problem is magically solved... but just in case decided to post here.
Please help, any ideas would be appreciated.
-Frustrated G7E user

galaxy7user said:
Hi guys,
I bought the unlocked firmware phone back in December 2016. The phone is great, the problem is I am using EcoMobile MVNO. It's refusing to recognize the network with the MVNO's sim card. I've spent hours on the phone with them and they claim all is OK on their (and Verizon's) end.
The phone sort of works, so I've just been grinning and bearing it so far. Using 4G switcher, I can put it in CDMA only mode, in which case it connects to '123456' and I can receive and make calls, and receive texts, but have no internet. If I put it in full LTE/GSM/CDMA auto mode, it connects to LTE, so I have internet, but it claims I'm not connected to Verizon network and in fact it's not available. So in this mode I can't receive calls or texts. Can't send texts under any mode. I've done a full factory reset at the MVNO's behest, of course that did nothing. The phone seems to connect fine to Verizon's network if I borrow someone elses's Verizon sim. My MVNO sim also works in my wife's iPhone5 without a problem. So it really seems to come down to the firmware on the phone. I'm holding out against hope that when Nougat comes to the G935U firmware, this problem is magically solved... but just in case decided to post here.
Please help, any ideas would be appreciated.
-Frustrated G7E user
Click to expand...
Click to collapse
Flash the vzw firmware or go through the steps for the hybrid rom with vzw modems implemented.

Thanks. I was really hoping for something less intrusive, maybe some CSC edit fix, or some such.

galaxy7user said:
Thanks. I was really hoping for something less intrusive, maybe some CSC edit fix, or some such.
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Click to collapse
Welp, the 7.0 update is here, and it didn't fix my issue, in fact now I can't even get LTE data as I used to get. :crying:

So I had this issue when I first got the nougat update. When I got my S7 I put in my brothers sim card to made sure it worked on Verizon cause i was buying it from someome and anyway I activated my straight talk verizon SIM and everything was great until I got the update and my service was weird and I didn't know what to do and then it dawned on me, I put in an actual verizon SIM card, doesn't need to be active let it register and then put your SIM back in and everything was great! Hope this helps...

Switched to TotalWireless, phone works now. They first sent me a SIM which didn't work, then had to send a different, post-paid one.
I now suspect if ECO also sent me a postpaid based SIM it would start working. Things are always way too complicated when Verizon is involved.

S7 U with Verizon MVNO
skater95 said:
So I had this issue when I first got the nougat update. When I got my S7 I put in my brothers sim card to made sure it worked on Verizon cause i was buying it from someome and anyway I activated my straight talk verizon SIM and everything was great until I got the update and my service was weird and I didn't know what to do and then it dawned on me, I put in an actual verizon SIM card, doesn't need to be active let it register and then put your SIM back in and everything was great! Hope this helps...
Click to expand...
Click to collapse
I'm tempted to try this as I'm having the same problem with my 935U and Xfinity Mobile (Verizon MVNO) SIM, instead of connecting to the Verizon network, it connects to network 123456. I did load the 935V firmware, which worked fine, but I'd prefer to return to the U firmware if this would work. Is this still working for you, and if so, do you just need to put the regular verizon sim in once and from then on the MVNO sim will work, and continue to work including after a reboot?

ralrdz said:
I'm tempted to try this as I'm having the same problem with my 935U and Xfinity Mobile (Verizon MVNO) SIM, instead of connecting to the Verizon network, it connects to network 123456. I did load the 935V firmware, which worked fine, but I'd prefer to return to the U firmware if this would work. Is this still working for you, and if so, do you just need to put the regular verizon sim in once and from then on the MVNO sim will work, and continue to work including after a reboot?
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I put in a Verizon SIM in it once and that was after the nougat update. But every time the phone restarts, I have to make a phone call for it to connect to the service or it will just stay stuck in "searching for service" but once the phone call connects, I hang up and everything works as it should.

skater95 said:
I put in a Verizon SIM in it once and that was after the nougat update. But every time the phone restarts, I have to make a phone call for it to connect to the service or it will just stay stuck in "searching for service" but once the phone call connects, I hang up and everything works as it should.
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Click to collapse
Thanks, strange problem. I'll probably just stick with the 935V firmware for now as that's working fine (just have the Verizon bloat and failing the hotspot check). I also have a dialog going with Samsung support to see if they're aware of the problem and have a fix.