gp modem+sim+connection URGENT

I have a GP modem that is very good connection. I use it 4 month only.Now I am using banglalionwaimax *king* pack.
That why i want to sell.
1 gb i upgraded 856mb left disconnection date is : 28/9/2011

Connection is good.No screech yet.looking new but unfortunately i lost the cap.
may all sim support. also you can use it as a card reader.

call me 01672455394,01927234530