If Motorola clearly states up front that you are not allowed to modify the phone and doing so may cause your phone to stop functioning properly then I don't really see what the issue is. If you want to mod your phone there are several models out there that allow it and to some degree even support it.
The point is that they "can't" say that. Once you buy the hardware it is yours to do with as you please. They can't force you to only be able to use in a certain way.
It'd be like saying they would only let you dial phone numbers in your own area code or only numbers with a "4" in them.
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If Motorola clearly states up front that you are not allowed to modify the phone and doing so may cause your phone to stop functioning properly then I don't really see what the issue is. If you want to mod your phone there are several models out there that allow it and to some degree even support it.
The point is that they "can't" say that. Once you buy the hardware it is yours to do with as you please. They can't force you to only be able to use in a certain way. It'd be like saying they would only let you dial phone numbers in your own area code or only numbers with a "4" in them.