I'm adding my parents onto my existing Sprint plan and I'm trying to find the best phone for them. They are extremely technologically illiterate, and all they want is a simple phone with exceptional voice and sound quality. My dad is somewhat hard of hearing so a loud earpiece is especially important to him. I've done a lot of research, but I'm looking for more opinions. Currently I'm most highly considering the Sanyo 2400 and 2300, and Nokia 6016i based on reviews I've read. I am also considering the Samsung a420 and 580, as well as the Motorola c290, but less so because of some mixed reviews reguarding earpiece and voice clarity. Any thoughts? Thank you!