i purchase my handset t700 on dated 18-02-2009. while using my mobile its ringing ton is disappear.on dated 23-08-2009.i complaint my dealer. he send this set to sony erricsson complaint center MANDI.But till now set is not repaired.it is 04-11-2009 today. it is very shameful. please do something about my complaint. again repeat problem----------ringing ton is disappear while coming to me,and all functions of set is very good.please please do something. the time is so much spent my m. no. is 9418133797