SIM for Mobile Internet Calls

Dear I have Nokia 6120c and installed Skype in it. I want to know that which Mobile Network SIM is best for internet for using Skype video calling. I mean as per best speed, package or price is no matter.

Currently, our (Pakistan's) GPRS/EDGE does NOT have enough speed to run Skype's video call. You may be in luck if you are able to run Skype's audio call on EDGE. But you have to experiment because as far as I know Mobilink has pathetic service and even Skype audio does not work on Mobilink (at least in Rawalpindi).