Ok, I got one of these phones today to replace my optimus V. AT&T has much better coverage in this area (versus Sprint). This phone is basically the same as all of the OPTIMUS series. This is a GSM version (AT&T). A data plan is NOT REQUIRED for this phone!!!!!!!!!!! You need only sign up for the $2 a day unlimited talk, or the 10 cents a minute plan. If you access something that REQUIRES data, if will tell you to add a data plan. You can add a DATA PLAN at a later time (if your choose to pay the high rates for data at&t wants). the phone will work on WI-FI for any of your data needs.... I turned MOBILE DATA **OFF**.... AGAIN, a data plan is NOT required for this phone. i'm happy with the $25 plan for 3 months @ 10 cents a minute.