Sony Xperia M2 Aqua ($ 173)

Features:
SensorsAccelerometer Compass Proximity  

Specifications:

BuildOSAndroid OS v4.4.2 (KitKat)  
Dimensions140 x 72 x 8.6 mm  
Weight149 g  
ColorsBlack White  
Frequency2G BandGSM 850 / 900 / 1800 / 1900  
3G BandHSDPA 850 / 900 / 2100  
4G BandLTE 800 / 850 / 900 / 1800 / 2100 / 2600  
ProcessorCPU1.2 GHz Quad-Core Cortex-A7  
ChipsetQualcomm MSM8926-2 Snapdragon 400  
GPUAdreno 305  
DisplayTechnologyIPS LCD capacitive touchscreen 16M colors Multitouch up to 4 fingers  
Size4.8 inches  
Resolution540 x 960 pixels (~229 ppi pixel density)  
MemoryBuilt-in8GB built-in 1GB RAM  
CardmicroSD Card (supports up to 32GB)  
CameraMain8MP 3264 x 2448 pixels autofocus LED Flash  
FeaturesGeo-tagging touch focus face and smile detection HDR panorama Video 1080p@30fps HDR  
FrontVGA 480p  
ConnectivityWLANWi-Fi 802.11 a/b/g/n dual-band Wi-Fi Direct DLNA Wi-Fi hotspot  
Bluetoothv4.0 with A2DP LE apt-X  
GPSYes + A-GPS support & Glonass  
RadioStereo FM radio with RDS  
USBmicroUSB v2.0 USB On-the-go USB Host  
NFCYes  
DataGPRS (Up to 107 kbps)  EDGE (Up to 296 kbps) 3G (HSDPA 42 Mbps; HSUPA 5.76 Mbps) 4G ( LTE Cat4 50 Mbps UL 150 Mbps DL)  
FeaturesSensorsAccelerometer Compass Proximity  
Audio3.5mm audio jack  
BrowserHTML5  
MessagingSMS (threaded view) MMS Email IM Push Email  
Gamesbuilt-in + downloadable  
TorchYes  
ExtraActive noise cancellation with dedicated mic ANT+ support Organizer Document viewer Voice memo/dial Predictive text input  
BatteryCapacity2300 mAh  
StandbyUp to 595 hrs  
TalktimeUp to 11 hrs 23 min  
Musicplayup to 37 hrs 11 min