Enable Tethering on Your iPhone 3G or 3GS 3.1.2 Unlocked With Blacksn0w

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According to GeoHot's blog, "To fully enable tethering, download a MobileConfig file for your carrier. Watch out for carrier fees for tethering."

So, if you want to enable tethering, here are the steps to take (you will notice that steps below are the same as in our prior guide 3.0 and 3.1, but this time jailbreak is required:

1. You will need to jailbreak your phone.  For detailed instructions, click here:

Blacksn0w Unlock (05.11.07 Baseband) and Blackra1n Jailbreak for iPhone How-to Guide

Like Pie? Download PwnageTool to Jailbreak iPhone 3.1.2 : UltraSn0w Unlocks 3.1.2 

2. Unlock using BlackSn0w

1…2…3… Blackra1n Unlock is Available Via Cydia 

3. Go to http://tr.im/oS1h

On your iPhone, in the Safari browser, go to the following website: http://tr.im/oS1h

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4. Go to Mobileconfigs and download

Press Mobileconfigs. Find your country, select your provider, and press download.

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5. Press Install and Confirm

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The message reads: "IMPORTANT: The authenticity of "US AT&T" cannot be verified. Installing this profile will change settings on your iPhone." Changing settings is exactly what we're trying to do. Confirm with "Install Now".

5. Go to Settings>>General>>Network>>Internet Tethering

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7. Bluetooth or USB

Decide how you'd like to tether. Follow the instructions on the screen (it's almost automatic).

WARNINGS:

    * AT&T could be charging you. Nobody knows.
    * Do this at your own risk.

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