I was on a family plan with unlimited data plan and I asked a rep in a corporate store a month ago if I wanted to leave the family plan was there a way to keep my unlimited data plan and stay on AT&T and he said there was no possible way I could split off and keep my grandfathered data plan. Today I went to T-Mobile to change carriers since they offered unlimited data ( and cheaper at $20 until March 23rd) and while I asked for the account number and pin # the rep on the phone asked why I wanted to leave and simply stated it was cheaper and I could get unlimited data. The rep on the phone then asked what would T-Mobile be charging me for this new service and then went onto saying I could keep my unlimited data plan. Now I am curious is that even possible or just some lie to get me to stay with AT&T and also under contract for 2 years?