Microsoft Lumia 550 ($ 138)

Features:
SensorsAccelerometer, Proximity

Specifications:

BuildOSMicrosoft Windows 10
Dimensions136.1 x 67.8 x 9.9 mm
Weight141.9
SIMNano SIM
ColorsBlack, White
Frequency2G BandGSM 850 / 900 / 1800 / 1900
3G BandHSDPA 850 / 900 / 2100
4G BandLTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800)
ProcessorCPU1.1 GHz Octa-Core Cortex-A7
ChipsetQualcomm MSM8909 Snapdragon 210
GPUAdreno 304
DisplayTechnologyCapacitive touchscreen, 16M colors, Multitouch,
Size4.7 inches
Resolution720 x 1280 Pixels (~315 ppi pixel density)
MemoryBuilt-in8GB built-in, 1GB RAM
CardmicroSD Card (supports up to 200GB)
CameraMain5 MP, 2592 x 1944 pixels, autofocus, LED flash
Features1/4'' sensor size, geo-tagging, touch focus, Video (720p@30fps)
Front2.0 MP Camera
ConnectivityWLANWi-Fi 802.11 b/g/n, hotspot), GPRS, EDGE, 3G (HSPA 42.2/5.76 Mbps
Bluetoothv4.1 with A2DP
GPSYes + A-GPS support
RadioStereo FM radio
USBmicroUSB v2.0
NFCNo
DataGPRS, EDGE, 3G (HSPA 42.2/5.76 Mbps), 4G LTE (LTE Cat4 150/50 Mbps)
FeaturesSensorsAccelerometer, Proximity
Audio3.5mm audio jack, Speakerphone
BrowserHTML5
MessagingSMS (threaded view), MMS, Email, Push Email, IM
GamesBuilt-in
TorchYes
ExtraOneDrive (15 GB cloud storage), Document viewer, Video/photo editor, MP4/H.264/WMV player, MP3/WAV/eAAC+/WMA player
BatteryCapacity2100 mAh
Standbyup to 672 hrs
Talktimeup to 16 hrs
Musicplayup to 60 hrs