It would be nice to have some documented facts for those people who unlocked using IPSF (iPhone SimFree) and now want to go to 1.1.3. There are scattered rumors that IPSF phone don't work well on 1.1.3. However, it would be nice to have some information regarding this type of unlock. Others might also want to know whether IPSF is reversible. I post this thread on behalf of some of my friends and those who want to know this info. Thanks for reading.