If the phone you are trying to unlock is less than $80, I would highly recommend that you get it unlocked via one of those IMEI services because honestly you will end up wasting more money on these turbo sims than on a factory unlock.
Plus turbo sims dont support each time you upgrade your iOS requiring you to buy a new "upgraded" chip to continue unlocking your iPhone.
As it was very easy to unlock my iphone after watching the video given by you as i am now satisfied about the device which i have buyed called R Sim. As I have buy it from the below given link. epayby.com/r-sim/