Samsung Z1 is really nice phone but little bit problems are der in it like less apps on tizen store and little bit camera problem. But in this phone I love some function which is really awesome like lock screen I had never seen this lock screen in other mobile which is der in this phone. This phone dont give any of the problems.I had purchased dis mobile since 4months n not a single problem yet.
Using this phone never creates problems but while using on wife it get hanged sometimes but after few minutes it be as before.