3GS 3.1.2 new bootrom tethered JB (blackra1n)

[merceken]

With the release of Limera1n and Greenpois0n am not so sure what this means .Am I now able to upgrade my firmware and if so what about unlock?I am currently stuck to 3.1.2.and uses Ultrasn0w unlock.

 

[merceken]

Worth mentioning that my phone is unactivated and BB 15.12.01.