As far as I know,there r 2 kinds of contracts for Taxi drivers
1.They will follow the instructions from the call centre and on meter
2.Karwa gives Taxi to its drivers for 12 hours and they have to pay a minimum of 200 or 220 QR/12 hrs.These people always go without meter.In otherwords,Karwa giving them cars for rent.Their target is to get to their daily minimum payment,else they have to pay out of pocket