YES this is Untethered for Old Bootrom 3Gs's. No there is no Unlock Yet for New Baseband 3Gs's. Sorry :/ & No Unlock yet for the iPhone 4S on 2.0.10 or 4 on 4.11.08 or 4.12.01. 4.11.08 Unlock is coming Very soon though!
Will unlock for Tmobile, Simple Mobile, 02, Red Pocket, ATT GoPhone & other Carriers! If you are on 4.3.5, 4.3.4, 4.3.3, 4.3.2, 4.3.1, 4.3 or 4.2.1 & below this Video will show how to update to iOS 5.1 & Unlock on the 6.15.00 Baseband using Ultrasn0w.