When I bought my S3 last year I gave my husband my Esteem. Lately he has been having issues with it....I plan on getting the S4 hopefully in the next few months and will be giving him my S3. Until then my son has a ATT iPhone 3 but is switching to Tmobile and will be getting the Note. I am considering getting the iPhone unlocked and giving it to my husband to use until he gets my S3. Question is should he use the iPhone or should he just stay with the Esteem for now? Would there be any differences in performance? We are both on Metro's $55 plan.