I have taken a students prepaid plan, which has on offer 100 local sms free everyday. However after 2 days the sms stopped working and i get an error message from the network operator. I have tried using the sim card on different mobiles, but the error msg is the same. The error is entirely with the network operator. I have given a complaint with the local airtel service center, but they behave very rudely and are careless with tech complaint given.