best network these days?

i have both zong and jazz sim. preciously i was using zong as my main sim but after all the firewall thing in pakistan it has degraded a lot. is it just for me or anyone else facing it? it stops working at random intervals and then comes back on after a few minutes.

on the other hand, jazz has expensive packages but the speed is consistent around 50mbps. i have been using rox but i dont think its worth the price.

what are your views on this which sim should be better in the foreseeable future?