i just buy new set lumia 620 about 5 days ago, at 2nd day the phone suddenly vibrate by itself even after remove and insert the battery, batery only last 2-3 hours. 3rd day sent back to shop, and the shop say no 1-1 exchange and advise check with nokia centre.

anyone here have same problem before? if sent to nokia service, are they replace the batery or phone unit immediately if defect found?

feel bad experience for 1st time using window smartphone.