i will guide you step by step to check if the recently device u have bought has been jail-broken before or not :)
sometimes u buy iDevices from ebay or any other sources , and u was wondering if the previous owner has jailbroken it or not
with this gig i will tell u how u could be to achieve that :D
no matter how much he did restore his iphone , deleted it or whatever he has done
if its jailbroken before u will know it ^^-
this works on all devices running ios5 or higher
iPhone5S and iPad Air are supported too ;)