Re-install the firmware (http://androidforums.com/htc-hero-sprint/45596-how-reinstall-os.html) if that fails, there may be a hardware issue. If HTC doesn't help you, here's a guide on how to disassemble an HTC Evo. Maybe a tech savy friend can do it for you. If you want to pay to have a service do it for you there are third partyHTC Repair Services.
Download 3 apps. cache cleaner cleans temp mem, task killer shuts down unused open apps, memory booster keeps ur phone from stuttering, and apps to sd moves apps to your sd card to free memory.
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Re-install the firmware (http://androidforums.com/htc-hero-sprint/45596-how-reinstall-os.html) if that fails, there may be a hardware issue. If HTC doesn't help you, here's a guide on how to disassemble an HTC Evo. Maybe a tech savy friend can do it for you. If you want to pay to have a service do it for you there are third party HTC Repair Services.
Download 3 apps. cache cleaner cleans temp mem, task killer shuts down unused open apps, memory booster keeps ur phone from stuttering, and apps to sd moves apps to your sd card to free memory.