[Q] Connecting to ATT Galaxy S2 - General Questions and Answers

I bought Galaxy S2 in China, flashed new ROM, and lost ability to use ATT SIM. Orange SIM works fine, but ATT one simple does not work anymore. I am in US now.
In setting->about phone->status it shows the mobile number from SIM, shows AT&T under "Network", service state "IN service", and "Not roaming".
However, phone does not make and does nor receive calls. If I replace ATT SIM with Orange one, it roams on T-mobile and works fine for calls and data.
Anyone can help?
thanks,
Michael

same here
i have the same problem. my flash counter is at 0. 3g data is down for me, but wifi works perfect. text messaging is also good. but i cant seem to find a fix for this

Related

[Q] [HELP] Vodaphone AU, Black Unlocked a108b on AT&T in U.S.

Need some expertise on this one!
So I bought the ChaCha unlocked on Ebay because I wanted a black Android phone with a portrait keyboard and liked the look of the black model from AU's Vodafone network. While it's reading the network as AT&T when I put my SIM Card in, I'm getting absolutely no data to the phone...in other words...none of my android apps will work unless I'm connected to WiFi. I can make calls, but that's it.
I've taken it to 3 AT&T stores here in the U.S. and they've tried connecting it to the data servers using different phone codes, but have been unsuccessful. These codes are normally 10+ characters in length.
Does anyone know what code would work on this phone in the U.S. on the AT&T network.
If it's not possible as is, is there a way to edit/change something to get it to work on a certain data code
All information is appreciated! Thanks!
Here's the phone I purchased:
http://www.ebay.com.au/itm/ws/eBayISAPI.dll?ViewItem&item=121007975870&ssPageName=ADME:X:AAQ:AU:1123
Anybody have any idea or suggestions? Is it a radio issue...do I need to flash another radio or is the hardware just not meant to work on the AT&T network in the U.S.? I can't figure out why calls work on GSM (it says my provider is AT&T) but data won't come through. Should I put it as GSM/WCDMA auto instead of GSM only...will that do anything?
My current radio is: 7.51.35.19

Just wondering

Would a lg g flex 2 for sprint work on at&t if i sim unlocked it??
yes and no, thats the problem i had with mine, i had a tmobile and at&t sim, everything worked except voice calls in or out....data, mms, and sms worked fine, but no voice, every time i would try to call, the phone would just lose signal...something is locked with it when it tries to use the GSM modem for voice if it connects to a domestic company like AT&T or Tmobile towers, however i know if you take it outside the US it will work...mine is sim unlocked...but until we get a hack out to fix that, then were screwed

4G connectivity problems. Tmobile sim w/at&t phone

Hey all. I just got my hands on the note edge from a friend. He says its unlocked although it was originally at&t (symbol on back cover). I put my tmobile sim in there and it seemed to work just fine. I was able to make calls and send and receive texts, etc. I did notice that I was unable to get data connectivity like 4g/LTE which I was getting on my old unlocked s4. It would just show the bars but not 4g/LTE/3g symbols. Are there any fixes for this or tricks to get the data to work or will it not be able get it at all because it was at&t to begin with and Im using a Tmobile sim? I would not call myself an expert around phones. The most I have done is install a different ROM but that was with supervision haha. I also tried to search for USSD codes but didnt have any luck with that.
Any help or advice is appreciated!
-Thanks

Issues on T-Mobile

Recently purchased the Xperia Z5 (E6653) and I am having some serious issues with calls on T-Mobile USA.
Calls don't dial out (or it takes multiple tries) and calls won't come in when the phone is connected to 4g (LTE); they go straight to Voicemail. I missed about 12 phone calls yesterday - just getting voicemail after vaoicemail till I realized something was wrong on my side. If I toggle off the LTE it drops to Edge (no HSPA+) and calls come in fast and outgoing calls are made with no problem.
I tried to reset the phone, then repair the software with the Sony Companion app. Still same issue. Looked online for the APN settings. Tried various ones. Re-downloaded the Internet/MMS via the phone itself. Same issue. Tried my wife's sim and it was still doing the same. I have a spare 5s and it worked fine both incoming and outgoing calls. So, it doesn't seem like its the sim card.
I have Rev 2 of this phone so I am not sure if that is anything to be concerned about. Am I missing something...any help on this would be appreciated.
Thanks.
Maybe flash a T-mobile firmware with flashtool?
Or Flash 209 firmware meant for usa?
Or wait for someone here that use this phone on T-mobile.
Are you on band 12 LTE by chance
No, it said band 2 with LTE Discovery. I am on the verge of sending it back. Swap it for another one. Let's see.
From what I have gathered/read - it should really be straight forward. Pop in sim, load Internet settings, and it should work on T-Mobile. The APN settings are correct.
Doesn't makes sense for it to completely not work on 4g and go to 2G (Edge) while skipping 3g. I'm wondering if the baseband might just be wonky. I just see this as causing more problems down the road which I don't want from a $520 device.
Any advice is welcome because I am ordering the same phone again. Lemons are always possible.
Could it be possible because I live a relatively rural area (East TN) and the phone does not support AWS? Since it doesn't support T-Mobile VoLTE and doesn't have AWS it is defaulting to 2G? Is this an issue in all areas or just rural? Apparently the E6683 variant doesn't have this problem as it supports AWS.
Check this http://www.xperiablog.net/2015/10/07/usa-buyers-guide-sony-xperia-z5/
That means ur phone should work fine with T-mobile,maybe go and get a replacement from where you bought it.

Problem: Dual Sim Not Working on SM-G930FD

I have the SM-G930FD, carrier unlocked from UAE. It's got the stock android 6.0.1 on it. I bought this phone from NewEgg in the US specifically to take with me to Asia so I can have a Thai SIM for data and my US number available for texts, and also for data when I'm outside of Thailand (yay for T-Mobile and free texting/2G internet). I just got to Thailand yesterday and the dual sim functionality is NOT working
Same issue as reported in the GS7 EDGE version here: http://forum.xda-developers.com/s7-edge/help/s7-edge-duos-data-connectivity-problems-t3349324 - but I don't see any reports of it happening on the regular GS7
More info:
Slot 1: Thai SIM card (I tried two different carriers)
Slot 2: T-Mobile SIM
I set EVERYTHING to use the Thai SIM, and have both SIMs turned ON. Everything works fine for a few minutes, and then BAM, Internet stops working! It says not connected whenever I try to load a webpage, etc. etc. The phone shows The Thai SIM for voice and text, BUT now it shows the T-Mobile SIM for data, EVEN THOUGH if I go back to the Sim Manager, it clearly has the Thai SIM set for data. And obviously it's not pulling data from the T-Mobile SIM or I would have (slow) internet on the phone. The only way I can fix this is to go to the SIM manager and switch to the T-Mobile SIM for data and then switch back to the Thai SIM. The only problem is that this fix could last 30 seconds, or it could last an hour.
In the thread referenced above, there was no definitive fix. Someone said install the Italy or France Firmware, but others say it didn't work for them.
If I turn off the T-Mobile SIM altogether, the Thai SIM's data is steady. But the purpose of this phone is to have dual sim!
The only other thing of note is that when I go to the SIM Manager screen, it shows my US number for my T-Mobile SIM, but it shows "unknown" for my Thai SIM. I checked the APN settings and they all look good.
Could this be a hardware issue that some people are experiencing? It's too late to return the phone :-/
Same Issue
Hey there. I have a G930FD from UAE and I'm having the exact same issue. I'm getting ready to push SUPERMAN ROM on to it to see if that might fix it. Such a pain.
Just wanted you to know you're not alone.

Categories

Resources