Zen Mobile — zen ultraphone pro 402 compalint

zen ultraphone pro 402 purchased from Mobile King - Attingal/ Trivandrum on 17/06/2015 and today 21/06/2015 at 4 o clock in the evening returned to Mobile King - Attingal for the the following reasons The sim port 1 one not holding connection continouosly and not showing range in some prominent areas where vodafone is full in range.Tried with different sim but same result. Battery is enough for 15 minutes browsing Blue tooth is very weak to cover a 10 m distance The rear camera claims to be 5 mp but it is contradictory to picture quality.