If you are planning to buy a smartphone but have a small budget in your tight pocket, then you may want to pick up a used smartphone instead of a new one. However, buying a used smartphone can be a bit tricky if you don't have any experience whatsoever about this "field". You cannot just go up there to the smartphone store and make a random purchase without even checking the whole condition of that phone thoroughly. And if you got the wrong device, it might turn out to be a curse for you.