Reportedly, Warid has pulled down its popular SMS delivery report service (popular because no other operator was offering this for free).
Service center was earlier saying that this blockade is temporary however they are now responding that service will remain down for in-definite time; maybe forever.
Some call this service additional burden on network capacity, while others loved it for the advantages it offered to end customers.
It merits mentioning here that all other operators had already taken down SMS delivery reports, while Warid was the only operator offering this service for free.
By the way, free balance check is another attribute of Warid (only), hopefully it will remain in-tact.