[ronnier]

Once it's jailbroken, you don't need an app. Just install the correct "profile" and it enables tethering natively.

[tomkinstinch]

Do you know if this will attract attention or fees from AT&T under their newly-priced tethering model?

[ajg1977]

Possibly. Until now AT&T have ignored (or been unable to detect) people who had artificially enabled tethering. Now that they have an official tethering plan,if they do have a way to detect unofficial tetherers then they may automatically add tethering to your account. This is similar to what happens if they detect you using a smartphone without a data plan.

[whatusername]

They charge you for just having a phone that can use data? Or they charge you because you are actually using data? If it's the first then it is crazy.

[spicyj]

If I'm not mistaken, the unsigned configuration profile fix comes with the carrier unlock (not out for the iPhone 4 yet), not the jailbreak.

[ajg1977]

You're mistaken.

I never unlocked my 3GS but had tethering enabled for most of the 3.x lifecycle.

[sirn]

I am pretty sure installing unsigned MobileConfig was disabled in 3.1.2. Maybe you already installed carrier update that has tethering enabled?

[spicyj]

Well, in any case, installing the profile from

http://m.peacefulinsanity.com/Tether.mobileconfig

didn't enable tethering on my 4.

[hop]

How do you change the profile? I don't see the tether option in Settings > General > Network