Here's how it works. The eFuse chip is tasked with verifying the handset's firmware (ROM), the kernel, and the bootoader version. If it detects that something is awry -- like a third-party ROM -- the eFuse chip "ignites," so to speak, bricking the phone. The only way to undo the damage is to ship the device off to Motorola and hope that they'll be sympathetic to your plight. Perhaps you fell down a long flight of steps and through a series of bumps and bangs, you inadvertently downloaded a third-party ROM and installed it.
Sounds pretty gruesome, right? But let's back up a moment. It's now coming to light that the eFuse chip isn't anything new, and in fact it's included on all of TI's OMAP3 processors. Why is that relevant? Well, the gloom and doom scenario being played out in the press hasn't been an issue for past devices with the eFuse mechanism, like the original Droid and Milestone, and it would be odd if Motorola suddenly switched directions with the Droid X.
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