my personal experience.
bought phone back in 2006.
first sim ufone.
was good but have to recharge card only.
telenor introduced ezelod.
opted for that.
but did,nt liked it much.
than opted for ufone than warid than ufone.
i biught almost 5-6 ufone numbers and 2 warid numbers.
1 zong number.
never went for jazz as it always do najaiz with it,s network quality.
though i bought 5-6 ufone sims till now one telenor one zong but my preferable network is warid in these 6 years.
using continuosly since 2007.
paying extra than other networks offer.
but what i am getting is setisfaction in call quality gprs and sms.
there is no one who is offering this simple and strongest quality network right now in pakistan.
now i am user of warid postaid.
and it,s the best network which is offering quality with great IDD call rates.
so sir it,s an advise stick to warid.
apko kisi aur ka maza nai ayega believe me it,s my personal exerience.