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 Originally Posted by JoshLitwiller
The ESN is encoded on to the comm board, so if you swap your comm board into another Pre, that new Pre will have your old ESN. Your provider won't even know the difference.
The comm board is very easy to find. Remove the battery cover and look at the back side. The comm board is now visible, just below the battery. (Not below as in, take out the battery and the comm board is underneath; below as in look at the battery, then look down a bit.) If you go to Main Page - WebOS Internals and click on the "Sprint Pre 2" link at the top, that article has a great photo guide to removing a comm board. Pay particular attention to step 13 when you're putting things back together.
If you're just moving the board from on Pre- to another, you can ignore all the instructions about creating a meta-doctor. Just run the standard WebOS doctor to get the Pre back to factory default once you've done the comm board swap.
Actually you can't. You still need to rewrite the tokens to the right serial numbers and calibrations.
And I agree with the other guys... while you're at it might as well swap it to a Pre Plus or Pre 2. I've seen bad ESN Verizon Pre Pluses going for 70 bucks for two. Rebuild one and keep the other as spares.
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