The carrier apps include an app store, an IM and social networking app, Loopt's social network, M Studio, Metro Navigator, Metro 411, and MetroPCS Easy Wi-Fi. There are also apps for extras, myMetro, Pocket Express, Rhapsody music, and VC Pay, a virtual payment card.
I tested the dual-band (CDMA 800/1900) Wildfire S using MetroPCS' network in San Francisco. Call quality was poor in my conversations. Voices sounded garbled to my ears, and also muffled and sputtery, as if audio were being sprayed out in dollops instead of as a stream. On the other end of the line, my friend heard distortion and tinniness, but no background noise.
Wildfire S (MetroPCS) call quality sample
Speakerphone was practically inaudible to me when I held the phone at waist-level (my standard), even with the volume cranked up to max and my fingers well out of the way of the speaker. It was so bad, I could barely hear the caller over street noise outside and six floors below. When the caller consciously spoke into the mic on their end, voices sounded tinny. It's a shame, too, because the caller said I sounded loud, clear, and unobstructed by any background noise.