Hello everyone today im gonna tell you some important tips before you buy a second hand mobile phone.So when you buy a second hand mobile first of all look its condition is there any damage or not. After looking it turn on the hotspot of the mobile and open all the apps one by one and minimise all now if mobile is heating then do not buy it.By this you can check phone is hanging or not.After that play a full hd video in it then look it from all angles if the light is not fadding then its good.Make sure that screen is working properly at the time of purrchase.After all that checking now open the settingabout phone, here you can see the legal information about the phone and the android and processor etc.