Lenovo Zuk Z2 Pro ($ 75)

Features:
SensorsAccelerometer Gyro Compass Proximity HeartRate FingerPrint  

Specifications:

BuildOSAndroid OS v6.0.1 (Marshmallow)  
UIZUI 2.0  
Dimensions145.4 x 70.5 x 7.5 mm  
Weight145g  
SIMDual-SIM Dual Standby Nano-SIM  
ColorsTitanium Black Ceramic White  
Frequency2G BandSIM1: GSM 850 / 900 / 1800 / 1900
SIM2: GSM 850 / 900 / 1800 / 1900  
3G BandHSDPA 850 / 900 / 1900 / 2100  
4G BandLTE band 1(2100) 2(1900) 3(1800) 4(1700/2100) 5(850) 7(2600) 8(900) 20(800) 38(2600) 39(1900) 40(2300) 41(2500)  
ProcessorCPU2.15 GHz Dual-Core Kryo  1.6 GHz Dual-Core Kryo  
ChipsetQualcomm MSM8996 Snapdragon 820  
GPUAdreno 530  
DisplayTechnologySuper AMOLED capacitive touchscreen 16M colors Multitouch  
Size5.2 inches  
Resolution1080 x 1920 pixels (~424 ppi pixel density)  
MemoryBuilt-in64GB built-in  4GB RAM
128GB built-in  6GB RAM  
CardNo  
CameraMain13 MP autofocus dual-LED + dual tone) flash  
Featuresf/1.8 phase detection 1.34 µm pixel size Geo-tagging touch focus face/smile detection panorama HDR Video (2160p@30fps)  
Front8 MP Camera f/2.0 1.4 µm pixel size 1080p  
ConnectivityWLANWi-Fi 802.11 a/b/g/n/ac dual-band WiFi Direct hotspot  
Bluetoothv4.1 with A2DP LE  
GPSYes + A-GPS support & Glonass BDS  
RadioFM radio (Not yet confirmed)  
USBmicroUSB v3.0 Type-C reversible connector  
NFCNo  
DataGPRS  EDGE 3G (HSPA 42.2/5.76 Mbps) 4G (LTE Cat6 300/50 Mbps)  
FeaturesSensorsAccelerometer Gyro Compass Proximity HeartRate FingerPrint  
Audio3.5mm audio jack  
BrowserHTML5  
MessagingSMS(threaded view) MMS Email Push Mail IM  
TorchYes  
ExtraPhoto video/editor Document viewer Fast battery charging: 83% in 30 min (Quick Charge 3.0) Active noise cancellation with dedicated mic Google Search Maps Gmail YouTube Calendar Google Talk MP3/WAV/WMA/eAAC+ player MP4/H.264 player SNS integration Google talk  
BatteryCapacity3100 mAh