I bought this s duos 3, but on the same day it started to hang. I thought this phone would be nice at this cost, but no, this phone hangs a lot, not only hang, its system gets crashed frequently, this phone is worst. I prefer to never buy this phone in any case. The camera also is not clear, the sound sometimes gets rough, and it heats a lot. I just installed whatsapp and facebook, still it shows memory full, the most of memory is taken by own apps, whenever I had to make urgent calls, this phone hangs and takes a lot of time to reboot. Never buy this phone.