(The picture above is 3 different pictures)
So I recently jailbroke my AT&T iPhone 4S running IOS 6.1.3
After jailbreaking it, I got a T-Mobile Micro SIM card activated to my number. Then I downloaded SAM from the Cydia app that is installed to the phone when jailbroken. I got the Phone to say the carrier selected is T-mobile (second picture) and to have the bars in the top left (first picture) but when I plug my phone into iTunes, it says the phone will not activate (third picture)
People on YouTube giving these tutorials did not have these problems. Please help!
Also, I waited to see if the T-Mobile symbol would pop up in the top left corner, yet it does not, and it does not let me text or make calls.