I went through this issue with ATT

Seems like more and more carriers are trying to move loyal customers (long time) customers off of their unlimited plans and start charging for data. If I were you, I would do exactly what they say and go back to the store and make them hold to the agreement you talked about and thought you were signing up for!

It took about 2 months for ATT to put me back on my unlimited everything plan and they were none to happy about it, but like I told them, I would never willingly give up my unlimited data, texting and talk plan. I realize what I have and because I upgraded phone, doesn’t mean I was upgrading or changing my plan.