If you have an IPSF Unlocked iphone in 1.1.1 or 1.1.2 you can now upgrade to 1.1.3 worries FREE.
Simply open itunes, and upgrade to 1.1.3.
When its done, download ziphone 2.2 http://www.ziphone.org/
Use the GUI select Jailbreak & Activate.
When its done, open installer, install bsd subsystem
Open installer again and install openSSH.
download signal.app files here http://ethanino.googlepages.com/Signal_Better.zip
SSh into the iphone, and upload signal.app to /Applications chmod it 755 and upload signal.plist to /System/Library/LaunchDaemons/
Download 1.1.2 patched lockdownd(required)
SSH it to the iphone /usr/libexec chmod 755
reboot your iphone and your done, you should get signal everytime you reboot or change sim automatically.