http://www.amazon.com/gp/product/B0081HMG9M/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

Old Android but it can be upgraded OTA to 4.mumble. Unlocked even though it says AT&T on the front.

Seems like a decent enough phone, for Android. He's had a few issues with battery life but nothing major.