again sorry to hear you have upgraded to version 2.2.1 acidentally. well at the moment ther are two methods to get your phone working with Qtel.
one is to downgrade your firmware and modem firmware too (now possible) provided the band isnt newest.

Alternative, you may purchase a turbo sim for 150 (or less) from any shop in souq, but check if its working in the shop.

the later solution should be fine. all the best.