I've seen a lot of remarks about good call recorder apps for the EVO 4G. None of them are really that good or reliable. To take advantage of native call recording on the EVO 4G, all you need to do is set the phone call to speaker after connected and then start the Voice Recorder app that comes with the phone. It records both sides of the conversation very clearly and you can adjust the speaker volume to about 75% for optimum audio capturing. In the state of Texas, it is legal to record any conversation without informing the other party that you are doing so. Be sure to check with your state before recording any phone calls covertly.