M2 refers to memory stick micro that was released by Sony in Joint venture with SanDisk. You can buy a 2gb micro m2 card and use it with digital cameras, MP3 players, PDAs and GPS devices. Storage capacities up to 32GB are possible with this format. If you are looking for a memory card that will give optimum performance with your Sony Ericsson phone you can buy2gb micro m2 memory... (read more)