Unlocking Code

Esteemed Techno geeks of nairaland, can you be of help to gve me the unlocking code of these phones,
1 Sagem My500c ( this reads sim locked, when a sim card is inserted)
2 sonyericsson v630i(this reads insert correct sim card, when sim card is inserted)
They are sent to me from britain, these re the problems on hands in about this phones