Warid telecom was cheapest ringback tones service provider in Pakistan. Before Warid customers could purchase as many ringtones they want with only one time purchase charges of tone and then monthly service rental 10Rs only. You buy ten tones you pay one time purchase charges for each tone then only 10Rs per month service rent, no matter how many caller tones you keep you were paying the 10Rs service rent only. Now rent have increase 10Rs to 20Rs,monthly and add taxes.
So now Telenor is cheapest ringback tones service provider. No rental charges only ringtone/album monthly charges which are about 11Rupees.
Mobilink, Ufone are providing ringback tones service at expensive rates since beginning with Ufone automatically force activating service to its customers then blaming them for self activation.