how to un bllok my iphone in europe

The only legitimate way to get a phone unlocked is by contacting the carrier to which it is locked and following whatever procedure they have. Some carriers will unlock phones at the end of a contract (e.g. AT&T in the U.S.), some carriers (e.g. all the Japanese ones) will not unlock for any reason. However, you won't know exactly what the procedure is until you ask.