I have a legit O2 iphone on 1.1.2 still. I only need to unlock the phone occasionally when I go abroad to use foreign SIMs. Generally quite happy on the O2 contract and will probs only need apps that come from the SDK. Now that there is real 1.1.2 software unlock (geohot's one), can I upgrade to 1.1.3/4 etc and use the full functions, and just downgrade to 1.1.2 and unlock/jailbreak it when I need to travel? I only worry coz I hear that once you go to 1.1.3 you cant downgrade to the 1.1.2 baseband anymore, which just leaves you with and ipod touch and no phone function. this this correct?