Does anyone know? I know that Micro SD cards are rated as a "class" number, that number being the speed in megabytes per second transferred. A class 4 can transfer 4mb per second, a class 10 can transfer 10mb per second. My question is this..................how fast can our phones transfer a megabyte? If i buy a class 10 card, can my phone transfer at that speed? Where can a person find this info out? TIA for your reply.