[Resolved]  Samsung — SAMSUNG GALAXY WONDER GT-I8150 not up to the mark

Address:

Thane, Maharashtra

I purchased SAMSUNG Galaxy Wonder GT-I8150 IMEI # [protected] in SEP 2012 from Muscat - Oman.
Performance of this particular handset is not upto the mark. This phone hangs a lot. Many a applications gets stucked in between working.
I have also formatted this handset twice but not beneficial at all. It is as same as it was.
It is extremely unacceptable from well known firm like SAMSUNG to produce & manufacture such models.
I lost my BILL also in Muscat & now I am back to India.
Is there any solution to this type of problem, can ANDROID version be updated in this handset.
Suggestion is highly appreciable.