If u are looking for a mobile in 3500rs then don't go for it. its a very bad device as compare to keypad mobile. My mom was using this device for 2 years. She got some problem everytime when using.
It had very loud speaker. The volume button and power button are pathetic. Not working proporly. It is running with stock android without GPS. Screen quality was bad but very srong device. Even if it fell on the ground so many time nothing happened. For normal use it is a good device. Battery not last long for a whole day.
If I am talking about it design; overall its looks good and what we expect in rs3500. It is very handy. Hanging issue is there. Heating issue while charging and talking.
If u think to go for this mobile then my suggestion is not to go for it. Go for a keypad mobile in that money or go for another device with some extra budget.