This is a scam of the highest proportion. They set you up with a good price and then send you an email that your unlock is ready but you need to pay a hefty price for it to be released to you. And oh! The first money you paid, it cannot be refunded to you because it is "pre-order", whatever that means. It is just like the NIgeria 419 scam but this time perpetrated from UK. Don't ever do business with this company or your money is gone