Samsung Mobile Company — Voice problem in the set purchased only one month ago

Address:

Aligarh, Uttar Pradesh

I have purchased samsung mobile Glaxy core DUOS on[protected] from company Dealer, Yash Enterprises Aligarh, with mobile set IEMI No. 357386/06/691905/3. The The set has problem both in incoming and out going calls. I visited the above dealer, but he is able to accept my complaint. When I purchased the mobile he told me that the set is equipped with GPS but it is not giving me this service . When i want to know the north direction, opening a programme with compass, this set simply displays "No orientation Sensor in Your Device"What is problem?. How can i know the direction while praying at some unknown place, while travelling? I do not want any repair in the set. I want to get anew set overcoming the above problems. Please acknowledge and reply at t he earliest. Dr. A. Baqi, [protected].