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It won't work on iPhone 2G. Your best bet is to install PdaNet (assuming you're jailbroken).
 
Are you jailbroken?

On Cydia there are two different apps that enable tethering on the 2g on tmobile. zmodem and iphonemodem, iirc.

it's easy enough that I have twice learned and forgotten how to do it, but it is very do-able. If you use this as your main Internet connection for large downloads, T-mo will probably cut you off btw. or charge you
 
On Cydia there are two different apps that enable tethering on the 2g on tmobile. zmodem and iphonemodem, iirc.

it's easy enough that I have twice learned and forgotten how to do it, but it is very do-able. If you use this as your main Internet connection for large downloads, T-mo will probably cut you off btw. or charge you

iPhoneModem seems to do the trick. :) I wanted a tethering option if I was away from home and couldn't find wifi in case I needed to use my laptop.

Thanks!
 
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