II am using an i phone 4s with a data plan of 300 mb shared with my wife's samsung phone. We usually use 200 mb per month. I wand an iphone 6. What is the least expensive but realistic and usable data plan can really use ? We have unlimited talk and text. We do not listen to music on the phone and don't use them for movies. We are now with att but ready to switch. I went to an att store but the rep only tried to sell me a $750 phone U-verse and an alarm system for my home. Said I could keep my old plan at same price but I'd need more data. I walked out due to the high pressure sale tactics and will switch to Verizon now. My iphone is not under a contract. The samsung is. I'd buy the i phone 6 for $300 and sign a 2 year contract. Any advice would be appreciated. Thanks---