Is anyone having any luck being able to tether after they've updated to the AT&T 5.5 carrier file? I saw a few posts in another thread where people were claiming that it worked, as well as MMS. Upon this news I decided to go for it and I updated my carrier file from 5.0 to 5.5. On the 5.0 carrier file, I was able to send MMS and also tether. After the update, the tethering option was still in my network settings. However, when I tried to connect my computer using bluetooth tethering, it wouldn't connect (despite finding the iphone). It would connect and then immediately disconnect. So, I decided to reboot my iphone and try again. This time, the tethering option was now gone from my network settings. I then proceeded to Reset Network Settings and try again. Upon doing so, the tethering option re-appeared, but it was different. It now said "Enable Tethering" instead of just "Tethering". When I tried to turn tethering on, it said to contact AT&T about adding tethering to my account. I went back in itunes and re-installed the 5.0 carrier file. Is anyone else having issues with the tethering function using the 5.5 carrier file? I am using an iphone 3G, jailbroken on OS 3.0.1.