dear sir

I had purchased a samsung mobile model SAMSUNG STAR last year in august from THE MOBILE STORE at Kurukshetra. And I am unsatisfy with its sms storage memory. Actually in specifications it was written that it was having sms storage of 500 sms. And it also shows storage upto 500 when inbox, sent box, draft box or out box are empty. But after after getting 200 sms it show sms memory is full. I had also cotact with service centre but they had no solution for that. CAN YOU HELP ME TO SORT OUT THIS PROBLEM.