According to David Lim, as reported on his blog, it seems that the DevTeam has found a new exploit to unlock the baseband firmware 3.1.3.

The full release of firmware 3.1.3 with baseband 05.12.01 could be close to you and we will keep you informed. So stay tuned!
Related posts:
- iPhone 4 Unlock on Baseband 02.10.04 with Ultrasn0w 1.3 – [Confirmed]
- iPhone 4 Unlock for Baseband 02.10.04 & above Almost Ready for Primetime
- Geohot Doesn’t have Exploit to Unlock iPhone 4 on Baseband 02.10.04 or 03.10.01
- Ultrasn0w Will Unlock iPhone 4 Baseband 02.10.04 & 03.10.01, Confirms Sherif
- How to Unlock iOS 4.3 GM on iPhone 4 using Ultrasn0w [Old Baseband]
