I have the sony ericsson phone and i don't know where to put the M2 adapter or how?

Question

i also don't know what its for .

Answer 1

M2 adapter isn't for your phone.  The M2 adapter is used so that a Memory Stick Reader that is capable for reading MS Pro Duo or MS Duo can read the M2 and you won't need to buy a new Memory stick reader.

If you were to use the M2 Adapter, one end you can insert your M2 stick and the other end would go into a Memory Stick reader that can read MSPD or MSD.