I use iPhone 4S on an Airtel postpaid connection.I had been to Chennai on this Monday. I turned off airplane mode after landing and noticed that location services were not working (maps, weather, etc.), whereas voice and data services were working fine. I restarted the phone and location services started working.I came back to Mumbai on Wednesday and facing the same problem, even after restarting. Location services are working fine on Wi Fi. So, I suspect this to be an Airtel problem. Is anybody else facing this problem?I don't want to waste my time talking to Airtel customer service.