Excluding Ufone, which cellular service provider (Zong, Telenor, Mobilink/Warid) is providing best service at reasonable costs these days in both prepaid and postpaid categories? A lot has changed with regards to data and 4G access is now a required feature. As an example, Ufone 3G coverage is pathetic on M2.
Please suggest and rate with regards to cost, voice quality, SMS delivery delays (if any due to frequent network congestion), quality and coverage area for good data connection (3G+ minimum) (in Islamabad, Lahore, Karachi primarily and on associated roads like G.T. Road, Motorways (M1/M2, etc)).