I m using gionee marathon m5 lite.it is very good phone because it has 4000mAH battery, 3gb ram and 32gb rom.it has dual sim and quad core 1.3ghz. It has no problem. It is looking nice.it is too good and smooth touch.i love it.samsung, sony and many others brands are problem of hanging but it is best phone.i like it.it is pretty phone.