I have a question on Micro SD card size and Speed. I tried contacted Samsung Suport, but they apprantly could not understand my quistion about card speed. Perhapes I will get better results here ( most likly). I am getting ready to Root the phone. As I understand it, it is best to get the fastest Micro SD card I can get. I understand the maximum size card the phone can use is 32G. But what is the fastest card it can use? Like a class 10? Or ??? Also what about the "ultra" cards? I thank you all for your help. When I asked Samsung simply what is the fastest speed Micro SD card the phone can use... I was repeatedly given the response of "it comes with a 2gig card... No real help... Never mentioned rooting to them... Great phone, but so fair in ten contacts with tech support I have been given the wrong info , or no help 9 times... So nice to find you guys are here to really help.