I understand how frustrating it can be to have to constantly change your ring tone when rebooting or turning off your cell phone.
To better assist you I need a little more information so I can research this issue further. What device do you have? How long have you had this issue? Does it happen every time you reboot or power cycle your device? Has there been any physical or liquid damage on the device?
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I am confident that once we gather more information we can fully address your concerns.
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It's the HTC Incredible 2, I've had this issue for the last several months, it happens every time I reboot or power off/on my phone. No, there's never been any damage at all to the phone.