
Originally Posted by
TeePee
While older Nokia DCT3 phones can be unlocked remotely using a code generated from the IMEI number, newer DCT4 phones used to require a device to be attached to obtain the code, but some software claims to be able to generate it, I'm looking into it now! Sony Ericssons require either a T28 datacable to link to a PC, or specialist software which comes with a dongle.
Unlocking is legal, although it may be banned in your contract. The illegal part is changing IMEI number, and the only reason anyone would want to do that was if the phone was stolen.