How to unlock Samsung Galaxy S III GT-I9300? Are you using carrier locked Samsung Galaxy S3? Want to unlock Samsung Galaxy S3 from O2, T-mobile, TMN, Orange and Three? Today is your lucky day. You can unlock Samsung Galaxy S3 for free with Voodoo Galaxy S III SIM Unlock application. It unlocks your Samsung Galaxy S3 baseband so it becomes able to use SIM card from any carrier without restriction. Note – root access is required.