My dad paid 7 dollars requesting simlock24 to help unlocking his iPhone 4. After the payment was made but nothing happened, there was no reply from simlock24 at all for 4 days. When I found out my dad paid someone to unlock his old iphone, I immediately contacted AT&T and had the phone unlocked within 2 hours. Afterwards I contacted simlock24 and to request for a refund. However, not only they refused, but they also blamed it on my dad for requesting them to do the work if only he could have contacted AT&T himself. During our last communication this company even threatened to contact AT&T and had that iPhone "blocked" again. Beware this company from Poland and these so-called excellent reviews, I don't think they are for real.