I have been using Warid Infinity (Unlimited Data package) for 15 months now, and they upgraded to EDGE in july in lahore after which I used to get maximum speed of my mobile (28KBps/220Kbps)
But now they have changed the so called unlimited package to 2GB limit. I have sent complaint/feedback that at least old members should have been exempted from this, though I don't think it will make any difference, so now I am looking for alternative. Apparently Ufone has cancelled their Umail package (their CS guy said that it doesn't come with unlimited data plan), and Zong is not showing edge or GPRS coverage here atm, so I will get a jazz sim tomorrow to test, though I had very bad mobilink experience last year, and I will hate to use it.