According to 4g its performance is not so good.It is hang a number of time while downling or browsing and try youtube.Its battery performnace is also poor according to 4g phone It is battery life end fastly.and a major problem I faced from this phone is that after 3 months it is switch off automatically and when I teried it on it is on and off suddenly.I am trying many times but atlast I take it to service centre and they repair it free.my experience is not so good from this phone but it is value for money phone and it is compatible for free calling I think so.