I think, in Pakistan 3G is being provided by many companies...

3G includes wi-max...
so Wateen & wi-tribe are providing 3G

EDGE also somewhat is said to be 3G (mostly referred as 2.75G) so the edge service having data rate of 144kbps or more can also lie under 3G...
I've used Mobilink's EDGE -- Data rate upto 300kbps for me...

I think you meant EVO (Evolution Data Optimized) of PTCL...
There is a similar service by World Call named as EVDO (Evolution Data Optimized) - have data rate upto 1mbps ...