HTC Butterfly S ($ 398)

Features:
SensorsAccelerometer, Gyro, Compass, Proximity

Specifications:

BuildOSAndroid OS
UIHTC Sense UI v5
Dimensions144.5 x 70.5 x 10.6 mm
Weight160 g
ColorsBlack
Frequency2G BandGSM 850 / 900 / 1800 / 1900
3G BandHSDPA 850 / 900 / 1900 / 2100
4G BandLTE 900 / 1800 / 2100 / 2600
ProcessorCPUQuad-core 1.9 GHz Krait 300
ChipsetQualcomm APQ8064T Snapdragon 600
DisplayTechnologySuper LCD3 capacitive touchscreen, 16M colors, Multitouch
Size5.0 inches
Resolution1080 x 1920 pixels
ProtectionCorning Gorilla Glass 3
MemoryBuilt-in16GB built-in, 2GB RAM
CardmicroSD card (supports up to 64GB)
CameraMain4MP, 2688 x 1520 pixels, autofocus, LED flash
Features1/3" sensor size, 2µm pixel size, geo-tagging, touch focus, face and smile detection, Simultaneous HD video and image recording, image & video stabilization, Video (1080p 30fps)
Front(2.1 MP)
ConnectivityWLANWi-Fi 802.11 a/b/g/n/ac, dual-band, DLNA, Wi-Fi Direct, Wi-Fi hotspot
Bluetoothv4.0 with A2DP
GPSYes + A-GPS support & Glonass
RadioNo
USBYes
NFCYes
InfraredYes
DataGPRS, EDGE, 3G (HSDPA 42 Mbps, HSUPA 5.76 Mbps), 4G LTE
FeaturesSensorsAccelerometer, Gyro, Compass, Proximity
Audio3.5mm audio jack, Speakerphone
BrowserHTML5
MessagingSMS(threaded view), MMS, Email, Push Mail
Gamesbuilt-in + downloadable
TorchYes
ExtraGPU, Active noise cancellation with dedicated mic, Document editor, Photo viewer/editor, Google Search, Maps, Gmail, Voice memo/dial/commands, Predictive text input, YouTube, Calendar, Speakerphone
BatteryCapacity3200 mAh
StandbyUp to 544 hrs
TalktimeUp to 29 h