Step 1. So go to www.t-mobile.com, make your account and log in.
Step 2. Near the right-hand corner of the page, there%26#039;s something that says Hello:(your name) then your number. Under that there%26#039;s something that says either choose your phone/not your phone. Click it.(pick the Samsung gravity, that;s what I used)
Step 3. Under the heading MY ACCOUNT go to change plan.
Step 4. then scroll down to the heading MY CURRENT SERVICES. and click change services.
Step 5. Then pick the service you want(not all have internet because they think you have a different phone)
I REALLY hope this helps!|||The only other way was if the Phone had wifi.|||you go to the place that you bought the phone and they can get it off.