 The M520, in addition to being a mobile phone, also functions as a camera phone with 1.3 MegaPixels, portable media player, text messenger, and a WAP 2.0 web browser and e-mail client.Marketed as a replacement to the SPH-M510, Sprint's first EVDO slider, the M520 became available on February 18, 2008.Critical reception to the phone was mostly positive.