thanks for your reply.
i am having a nokia 2865 also. if i am using it with tata, there is no problem. may be the network capacity of samsung max is poor compared to nokia set. one strange thing happened today. when i was typing a message, it got hanged and swithced off. when i tried to switch it on again, but it didn't come on. then i took the battery out, put back again and tried to switch on and this time the phone got switched on.
what is this. does my handset got a problem?