Database Users

Phone has Randomly gone into NO SERVICE

my phone hasnt gotten any signal for the last 2 days. i dont know what happened, the phone just says NO SERVICE. I know its not my T-Mobile account since my sim card works perfectly on another phone. this phone has never been dropped, and its only about 3-4 wees old. It started when I was eating lunch in my school's cafeteria (which is underground) when i noticed i had no service and a "g" every once in a while (theres usually atleast 2 bars and always 3g since my school is downtown). i thought nothing of it since it was underground, but my signal never came back.
what should i do? i flashed the newest radio earlier and now i dont even get the "g" anymore.
it's running virtous 0.8.1 with S-OFF. i also tried my cyanogenmod backup but there was no difference.
im going to try to return everything back to stock and see if it works. did this happen to anyone else? if so how did you fix it?

does anyone have any information that could help?

Probably a long shot, but have you tried enabling and then disabling airplane mode?

Idk if this'll work, but hey its worth a try call *#*#4636#*#* and change your settings, it should restart your network. Hopefully.
Sent from my HTC Vision using Tapatalk

Did you test the SIM in another phone? Did you try enabling 2G networks only to determine if this is related to 3G/4G? Did you call tmo to see if there are network issues in your area?
What is your city location?
Sent from my T-Mobile G2 using XDA App

i have tried those things, when i do *#*#4636#*#*, it shows that i have a signal but it doesnt show on the status bar or that im connected to tmobile. when i go to select network in settings, it says my sim card wont allow me to connect to this network, which makes no sense since its a tmobile sim card and was working fine 2 days ago.
i live in Buffalo, NY. there is no network outage here since i tried my sim in another phone and it worked fine

buffalowings said:
i have tried those things, when i do *#*#4636#*#*, it shows that i have a signal but it doesnt show on the status bar or that im connected to tmobile. when i go to select network in settings, it says my sim card wont allow me to connect to this network, which makes no sense since its a tmobile sim card and was working fine 2 days ago.
i live in Buffalo, NY. there is no network outage here since i tried my sim in another phone and it worked fine
Click to expand...
Click to collapse
All bets are off until you restore the stock rom with OTA update. Post back once you've returned it to factory because tbh, nobody from T-Mobile can or will help you either if your phone is all jacked up.

buffalowings said:
i have tried those things, when i do *#*#4636#*#*, it shows that i have a signal but it doesnt show on the status bar or that im connected to tmobile. when i go to select network in settings, it says my sim card wont allow me to connect to this network, which makes no sense since its a tmobile sim card and was working fine 2 days ago.
i live in Buffalo, NY. there is no network outage here since i tried my sim in another phone and it worked fine
Click to expand...
Click to collapse
This is a network issue, its not your rom, no worries. When registration fails or network not allowed happens, tmo needs to send an engineer to the local towers to fix it up or file a trouble ticket. Is it happening within your home area, such as a 7 - 10 mile radius - or wider.
Take my word for it, you need to call
Sent from my T-Mobile G2 using XDA App

I have the same problem, and I'm in the LA area. Called, T-Mo and they said there werent any outages at the time.
Tried enable/disable airplane mode. no go.
Tried enabling only 2g mode. no go.
I don't have another phone with me to try my sim card in right now, so will try that later (T-mo rep said to use the new sim card).
I'm running stock on my g2. Will update when I get it fixed.

I'm having the same issues. went back to the stock ROM. went through several different ROMs still, the same.
Someone PLEASE help.

Sim card try another, seriously, happend to me once and a friend... went back to stock and everything.
G2 doesn't like sim cards....

Same thing happened to me. Card worked in my old G1 but not my G2...it was less than 30 days so they replaced it. This is worrying me though...I hope it's not a common issue that can just happen any time.

Unable to turn ON data connection on Focus v1.3

I have a unlocked Samsung Focus v1.3 with Mango update. I am a 3G SIM card (Airtel 3G).
Sometimes when I am trying to enable data connection, phone is refusing me to do that. The setting shows data connection ON, but 3G symbol on top does not appear.
This happens even on multiple retries and when signal strength is full. Using the same SIM card I am able to connect to internet using my older Nokia phone without any issue.
The only solution I have been able to find is to soft reset (restart) the phone. Then it is able to enable data connection. I also think that this issue appeared after I updated it to Mango. With stock NoDo update it was working fine (though I had this phone only for 2 weeks before updating to Mango).
Is anybody else also facing this issue?

yes i am having a similar issue with my focus, it is unlocked for use in the UK on o2 but when ever i turn my data on it says its connected i have the 3g symbol and everything but when i try and go on the internet it has not connection to resolve this problem i delete my apn and enter it again but that dose not work sometimes and it is really annoying
many thanks if you can help me

^^ Thanks for confirming that I am not the only one facing this issue. But still it is weird that only a few might be facing this issue.
I am still trying to find out the exact solution, so whenever I find it I will post it here.

APN settings? is the sim card for that device originally?or carrier specific"?

Vintage144 said:
APN settings? is the sim card for that device originally?or carrier specific"?
Click to expand...
Click to collapse
I have used correct APN settings for my Service Provider. Hence on a good day, I am able to connect to Internet. I have also confirmed the settings from CC.
But as I have described earlier, sometimes phone just doesn't turn on data connection. This happens without any specific reason. On other forums too people are reporting the same behaviour.

Same problem here with Movistar in Colombia
Sent from my Samsung Focus using Board Express

fixed my problem, i had the radio set to north america instead of world

marousa_king said:
fixed my problem, i had the radio set to north america instead of world
Click to expand...
Click to collapse
That has nothing to with problem I am facing. This setting for radio is for FM radio and not for mobile radio. You might face the issue again. Sorry but that's the truth!

did u try another sim card?
A friend with same data plan?
And another operator sim?

When i changed wifi to data it came to me, there was a app for that first it closes wifi then open data connection. For wifi again, first it closes data connection and opens wifi.

I got same problem. Using unlocked focus with airtel connection india. On a good day the phone will work with gprs/3g just fine. But occasionally connection drops and the phone won't reconnect. I have to manually restart the phone to connect to internet once again. Any solution for this? I guess people in US aren't facing such an issue..

I have the exact same problem. This problem arises only on DATA connections!
Using ATT Samsung Focus v.1.3 on Idea Cellular Sim Card in India

[Q] Who else is having issues with keeping a connection to AT&T?

Right out of the box, after I popped in my att sim (now microsim) card that originally was for an Atrix 4G, I noticed that after the cell connection was idle for like 10 seconds, I would loose any and all connection with the cell network. My N4 still recognizes that it has a sim card inserted, and is aware of my phone number, but no matter what it won't reconnect with the cell network until I reboot the phone, and then this cycle continues all over again. Call quality and reception are great when I have it however. I've already messed around with some of the suggested APN settings, but even of those work, my problem still remains. Does anyone know what's going on here? Do I just need to go into an ATT store and get an official microsim? And I don't know if it's related, but I can't seem to get any type of GPS connection/lock either. Not a single time since I've had the phone (it arrived today).
EDIT: Seriously? No one else it having this problem? I even got a new microsim today and activated it, but the same problem is still present. Is this a Nexus 4 problem, or a carrier problem?

Odd data connection issue - Nexus 4 / T-Mobile

When I try to connect to a T-Mo tower for data al I get is an icon in the notification area saying "Sign in to Network" =. When I hit that I am sent to a T-Mo page asking me to sign in. I give it my credentials and press login but nothing happens.
I've talked to T-Mobile and they cannot find anything. They've sent me to Google. Waiting for them to get back to me. In the meantime I figured I'd ask XDA. So, any ideas?
Relevant parameters:
LG Nexus 4
The phone is bone stock Android 4.3
The SIM is new (about 2 months)
I can make calls and text on T-Mobile.
The SIM works in my old Nokia N97 phone and talks to T-Mobile Edge data fine.
The phone connects to ATT HSPA data fine when I put an ATT SIM in it.
The phone connects to data abroad.
Airplane mode is not on.
Data is on.
Roaming is on.
WiFi is off
Airplane mode is off.
I have wiped the phone and started from scratch, no luck.
I have tried in Safe Mode, no luck. (So it's not some odd App interaction)
I have told T-Mobile to kick me off the network and then wiped and restarted, no luck.
I have been through all the APN setting with T-Mobile, all is well.
I have wiped caches, no luck.
TIA

I'd look up the APN details on here for tmobile. Cant find a link at the moment but i know there are a few out there. T-mobile people usually have no idea...
It sounds like something on the carrier's end though. quick search brought up several topics on xda but no real solution.

It has happened to me as well, but my data still works. Sometimes I just reboot it, or put it in airplane mode and it will go away.
Unless u never get data.
Sent from my Nexus 4 using Tapatalk 4

this happened toe last night as well, lasted about 3 hours or so. it connected to the towers jist fine, sometimes the signal bars turned blue, sometimes not. but no data flowed through, neither via lte or hspa+. i called tmobile to check if they had an outage, they said no. i had them reset my data connection, but that didnt help. eventually data started flowing via hspa+, then via lte an hour later. i did all the troubleshooting, it wasnt an issue with the phone nor sim card. it was a tmobile issue for sure.

S7 SM-G930V can't connect to Verizon Mobile Data

Hi everyone, so I recently purchased an S7 SM-G930V and I'm having some problems with the mobile data connection and was hoping that someone on here might be able to help me out. I've been heavily researching and trying everything I can find online for 2 weeks now trying to figure out why I cannot get this phone to connect to mobile data and I'm about to give up and use it for target practice.
So here's the story:
I bought the phone from a seller on Ebay (I know I know) and it showed up in flawless condition externally and SEEMED to work perfectly. Upon receipt of the phone, I noticed that my current simcard wouldn't fit so I took the phone to verizon to get the nano sim and have it activated. The guy put the sim in and booted it up but after about 15 min the phone was still saying that it was "activating" so (being in a hurry) I told him that I'd just let it activate and be on my way. About an hour later my phone chimed saying that activation was complete but I noticed that it was showing H+R for a data connection which I believe meant I was roaming? Anyway I didn't think much of it because I was in a pretty rural spot in Alaska and the service was spotty.
Now here is where the problems started. Once I got home I noticed that the phone was not picking up any 4G LTE data at all and was bouncing back and forth between 3g and 1x but wasn't actually connecting to them, just finding them (greyed out). I rebooted the phone to see if maybe it just needed to update the local towers or something but it still would not connect to any mobile data at all so I took it back to the verizon store and they swapped the sim for a new one. Now, the phone will not activate AT ALL. The guy tried 3 different sim cards and nothing. It shows fully connected (5 signal bars) for voice but just cycles randomly between 3g and 1x data and will not connect to them let alone even find 4g lte service. When it connects to the towers it shows Verizon Wireless as the connected carrier but since it can't connect to data, it won't activate. The guy finally told me to call tech support and after about 3 hours on the phone with them, they pretty much told me they don't know what's wrong and to get a new phone.
So I decided to hit the internet and try out every option I could find before just sending the phone back. However, after countless hours of tinkering with the phone including rooting the phone, updating the firmware, factory resetting multiple times, clearing cache, disabling the cell radio and changing settings in build.prop, default.prop, apns_config.xml etc etc and getting nowhere I am stuck. I was really hoping that this was just a software issue or APN/modem/radio band etc issue that I could fix but it's looking like it might be a hardware problem or it's way above my skill set.
TL;DR
Verizon Galaxy S7 will not connect to any Verizon Mobile Data Network and therefor will not activate but it will connect to data while roaming? Any and all suggestions, help or advice is appreciated! Even if it's just to tell me that the hardware is faulty and I need to replace the phone. I just need some opinions from the pros if possible. Thanks guys/gals.