I have a PowerBook G4 with bluetooth, can I use internet on it through my (to get) iPhone with bluetooth?
Just curious 🙂
Will it cost more of iPhone's battery life?
yes you can,
use PDAnet (runs in iphone) program to set up adhoc network and share your 3g connection.
i use it all the time. make sure your carrier supports tethering.
PDAnet works over Bluetooth?
And what is the difference between support and allow, since AT&T doesn't allow you to tether the iPhone.
If you have a jailbroken 3G or 3GS and it's still on 3.1.2, these instructions show how to enable tethering and how to use it without 3rd party software (like MyWi): http://www.redmondpie.com/enable-tethering-on-iphone-3g-3gs-3.1.2-firmware-eqw846/.
P.S. If you install OpenSSH, change the root password. There are explicitly labeled instructions in Cydia for doing so.
Is the official tethering option carrier specific? It came as default on my 3GS 😕
My iPhone is not jailbroken, and I prefer to keep it that way. So then, there is no option?