I bought an iPhone 4s (earlier AT&T) which has been unlocked. But even after repeated attempts I have not been able to get it to pick up t-mobile network.
It just shows 'No Signal'.
When I turn-off the automatic carrier selection, I am able to see t-mobile and t-mobile (3G) in carrier list but selecting them does not do any thing.
Here are the things I have tried:
Still all I have is 'No Signal'!!!
Has anyone else been having this issue? Is this a weirdness of iOS 6.1?
Any ideas on what should I try next except getting a new carrier.
Because I verified that with At&T SIM the phone works just fine.
Have you tried to turn on roaming and disable 3G to see if you can pick up 2G network?
Let us know
I turned off 3g and enabled roaming, still no luck.
I know you stated that you got a new sim card.Couldyou put that sim in a test phone and see if it picks up T-Mobile signal?
I went to the T-mobile store and tried out my micro sim in a HTC 8x windows phone (it takes a micro sim).
It worked perfectly.
Unfortunately they did not have a test iPhone.
Is some kind of jail breaking needed to change the frequency of iPhones before they work on t-Mobile?
Apple just released an iOS 6.1.1 specifically for iPhone4S to address modem connectivity problems that were introduced with 6.1. While my wife's 4S never had a problem on Tmobile with hers using 6.1, you should try and update to this version. It showed up on her phone this morning. Should be able to access via wifi atleast, or through iTunes...
I did a 'reset' again yesturday it updated to iOS 6.1.1 . But no luck in fixing my problem so far.
When you reset and reload through Itunes does it tell you the device is unlocked
i'm having a similar issue on my 3gs with 6.1. sim works fine iphone 3g, or my android handsets. data doesn't work at all, and phone service is very spotty.
Sounds like there is an issue with the device, If we confirmed the Sim works in a T-Mobile device then it would be an issue with the iPhone
I tested the device with a straight talk SIM card. It worked. So device is good.
I am not sure what the issue is? The sim card is good as it works with another device. It is just not picking up the 1900 MHz frequency in that area. What area are you in, zip code?
My iphone 4s has exactly the same problem. Work with AT&T sim card but do not work with t-mobile sim.
I'm sure that t-mobile sim card and network are ok because my other iphone 4s could pick up t-mobile network.
Was there ever a solution to this issue? Im having the same issue. Been using a Tmobile Straight Talk sim card for 2 weeks. Yesterday morning my iphone 5 went to "No Signal" status. Its been that way ever since. I went to a tmobile store today and they said that many people are having this issue with unlocked iphones and it COULD have something to do with the upgrades being performed to bring on the iPhone 5 for tmo.
I cannot figure out whats going on. When I went to the tmo store today the rep gave me a genuine tmo sim to try, it didnt work either. Is it possible that in my area unlocked iphones just arent working?
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