IS IT SAFE TO BUY USED MOBILES OR REFURBISHED MOBILES | VANGALAMA VAENAMA ?

In this video I gonna give a clear description on how to buy a used or refurbished mobile and going to provide a conclusion of whether to buy used mobiles or not. IPHONE CLONE/FAKE CHECK : https://checkcoverage.apple.com PHONE DOCTOR PLUS : https://play.google.com/store/apps/details?id=com.idea.PhoneDoctorPlus