Gionee f103 is fine good to use .it consists of 6.0 marshmallow and amigo 3 .however its battery backup is not so good .Display and touch sensors are fabulous .i have gionee f103 in jan 17 .It is easy to use .Gionee have a smart gesture option which is very helpfull to use in day to day office work .
Some drawbacks of f103-
Camera clearity is no so good
Battery backup is low as compare to other smart phones.
Sometimes hanged if internal storage have high amount of data used.
Phone call voice is not so clear .
Background data consumes more as compare to other phone which I have noticed.
Some of the google apps is also not work in f 103 .{ Lock pattern apps} .