Does anyone have any suggestions as to why this is happening? It's been fully charged, I took out the battery and put it back in, and still nothing...it just keeps shutting off and then on every minute or so...do I need a new battery or is it something requiring repair?
Take the battery out and gently clean the contacts with a Q-Tip or can of compressed air. Then, fold a small piece of paper a couple times and stick it between the battery and the phone itself.
This is a known issue with the EnV3 and the ONLY way we've figured out how to fix it is the above suggestion. The batteries were made slightly off so they get dirty very easily and the paper helps them fit more snug. This will only fix the problem for a few months or so, but just keep doing it and it will help a great deal.