As we know, iPhone OS 3.0 allows you to tether your iPhone's 3G connection to your laptop, or other mobile gadgets online while on the move. AT&T don't officially support it so far, while others like O2 in the UK will offer it but of course with an extra data plan.

But, no matter you had a tether-plan status or not, here is another way to enjoy tethering - but do it at your own risk, of course.

One thing we know about iPhone users, though, is that if you show them a sign saying “no entry” they’ll work out a hack to enable it, and sure enough there’s now a simple way to turn on iPhone tethering no matter your carrier or tether-plan status.  All you need do, in fact, is visit help.BenM.at on your iPhone and install a new local carrier profile configuration file.

There are files for tethering on multiple carriers – not just the official Apple partner in each company, but rivals for those using their iPhone unlocked – and more apparently being added all the time.  Plus, there are install files for MMS support, including AT&T who have previously said that they won’t be officially enabling it on the iPhone until late summer.

[via SlashGear]