When it comes to unlocking phones using an online IMEI service, the first thing that should comes to our mind is how trust worthy the website we are about to deal with? and for how long you are going to be waiting to unlock your phone?
People used to believe that a website that offer a Paypal payment is fairly secure and you have nothing to be concerned about.
In fact, nowadays a lot of scam websites are now offering Paypal payments and indeed they are robbing people's money, specially the websites that claim to offer services.