Phone Is Unlocked But No Service

Learn about how unlocked cell phones work. You will need to use a SIM card from a GSM provider to get service for your unlocked phone. Shop unlocked phones. I unlocked my iPhone 4 with T-Mobile, I got the instructions email, followed instructions and the phone was still saying 'No Service' when. S2 Unlocked but says No Service SOLVED View solved. The Sim card works fine in a different unlocked Samsung phone and is a fairly new Sim card so I know.

How To Unlock A Sprint Iphone 5 For Straight Talk. How To Unlock Iphone 5 O2 Uk In India. I successfully unlocked my Samsung Galaxy S 4G. However when I insert an AT&T sim, I show full bars of signal but the screen says (No Service).

I've tried two different sim cards and neither will work. They are both older sim cards but they should still work, right? Only thing that stands out as odd is the AT&T APN isn't checked blue; it's white (unmarked?) and can't be selected.

I'm using Gingerbread 2.3 and my T-Mobile card works fine. I have my network bands set to automatic. And for the record, in order to connect to AT&T's network, I need to use the AT&T sim all the time, right?

Iphone 4 Unlocked Ebay Usa. I won't be able to connect to AT&T when using the T-Mobile sim, yes? Quote: Originally Posted by mcbipolar I successfully unlocked my Samsung Galaxy S 4G. However when I insert an AT&T sim, I show full bars of signal but the screen says (No Service).