The Gevey SIM is a "tethered" unlock, requiring an emergency call to 112 in order to connect after every baseband reboot. Its legality has been questioned multiple times. With FuriousMod (see link below) it is not necessary to manually dial emergency numbers, so the chance of error is smaller.
- MuscleNerd tweet with link, links to this write-up
- MuscleNerd says it's illegal in most countries
- Official resellers: Gevey [Archived 2012-01-25 at the Wayback Machine], Applenberry, list of others [Archived 2012-02-15 at the Wayback Machine]
- FuriousMod [Archived 2012-02-08 at the Wayback Machine]
- Gevey Ultra S[dead link]