Aircel is really a useless sim. Maximum time No network available. Sometime It says Insert sim card which is a big fault of a sim card. They active callertune automatically and debits account balance which is sign of a poor quality service and their customer care is always very busy atleast they hold me upto 45 minuites , sometime after waiting 30-40 minuites call connection cuts what a joke. Only thing is good they charges and bills low. But comparing to quality its totally worst.