If you want to buy good UK Used Phones – iPhones, Samsung Galaxy, HTC, Sony Xperia & Huawei Android Smartphones In Ikeja Computer Village, Lagos, Nigeria


here are better checks you should do:

Go with your charger to be sure the smartphone USB port works well and can transmit power.
Go with a SIM card so you can make or receive calls
Go with a headphone to be sure the audio system is OK!
Try to transfer files via Bluetooth or Xender to be sure you can share music and videos
You can also try the WiFi connectivity to be sure you can enjoy wireless internet connections around you.
Take a shot of one or two objects around to see how the front and back camera quality plays out.
Don’t rush to go, wait for 20, 30 minutes to 1 hour and see the battery strength, make several calls and see if the battery will run down faster – you wouldn’t want to buy a used phone that drains faster on one or two calls.

Source: UKUsedPhones.com

Nice one OP. to avoid story that touch

Thanks

Also know the specs of the phone and install cpu Z and antutu benchmark on it and run a test so that you won't buy a cloned phone..

Nice