Nokia 2630
Set not working Properly

I have purchased New Nokia2630. in myb set when i call some one other person receive my call but i m not informed.

Also a problem of Voice Echo.

when some one calling me i cant hear other person voice.

I GIVE MY MOBILE THREE TIMES TO NOKIA SERVICE CENTRE AT MULUND (W), MUMBAI. STILL NOW THE PROBLEM IS THERE.

NOKIA HAS WORT OF THE WORST CUSTOMER CARE.