I am looking for a phone with a long battery life, wireless capabilities, 2.0 megapixel + camera, and preferably slide-out keyboard. It does not need to be very powerful or feature-heavy, in fact the simpler it is the better. I'd rather it is CDMA and already or will soon be available for less than 100$ used or new without a contract.
To provide some context, I work for a nonprofit called SeeYourImpact. We partner with a number of charities in developing countries who record "impact stories" for us in often challenging environments. Unfortunately, recording these stories is taking an inordinate amount of time and effort for our partners, so I am developing an Android application which we will give them along with a phone to simplify and streamline the process. The phone will essentially just be a vehicle for the application, which is why CDMA would be best, to make it otherwise useless outside the States (kind of a cruel move I know, but it must be done :/ ). Also, many of our partners aren't overly familiar with technology, so the simpler the phone is to use the better.
Any recommendations are much appreciated