Env2 shuts down randomly

[Macskeeball]

I've had an enV2 for 2.5 years now, and I like to keep it on 24/7 (usually on standby). In recent months, it has started shutting down without me telling it to. It's seemingly random. When I turn it back on, the battery shows nearly a full charge. This happens even when my phone is on a desk instead of in my pocket.

Is there something I can do to fix my phone? I could get a new phone, but I don't want a contract or a data plan and money is tight right now. Thanks!

[Macskeeball]

I found this: http://www.fixya.com/support/t193266...omly_turns_off