Hi, I have xperia x8. I want to change network but the fee charged is ridiculously expensive (almost half the cost of the phone), or maybe I bought the phone too cheap. So anyway I'm looking for cheaper alternatives. The only company I know that can unlock xperia phones is www.fastgsm.com. Anyone knows any other (trusted) one? THere is a lot of discussions here about rooting the phone. Can we unlock the phone this way? Is the locking thing kept in the file system?