Hello all...newb here. I've read through many threads here and haven't found specifics so here goes: I have an iphone 4s Verizon warranty replacement from Assurion. (Verizon's insurance company) It's a refurbished model and I have not activated with Verizon yet. I ran the meid# through the Straight Talk website and apparently it can be activated with ST so I have ordered the At&t compatible micro sim for it...does this sound right so far? My other questions: Is this warranty replacement 4s unlocked? After activating with ST can I expect mms and visual voice mail to work normal? Is it possible to get LTE on the 4s with ST? (I think I read that somewhere) Thanks for any help!