Lenovo A3690 ($ 0)

Features:
SensorsAccelerometer Proximity  

Specifications:

BuildOSAndroid OS v5.1 (Lollipop)  
Dimensions141.2 x 71.2 x 8.8 mm  
Weight140 g  
SIMDual SIM Dual Standby Micro SIM  
ColorsBlack White  
Frequency2G BandSIM1: GSM 900 / 1800 / 1900
SIM2: GSM 900 / 1800 / 1900  
3G BandHSDPA 850 / 900 / 1900 / 2100  
4G BandLTE 1800 / 2100 / 2600  
ProcessorCPU1.0 GHz Quad-Core Cortex-A53  
ChipsetMediatek MT6735P  
GPUMali-T720MP2  
DisplayTechnologyIPS LCD capacitive touchscreen 16M colors Multitouch  
Size5.0 inches  
Resolution720 x 1280 pixels (~294 ppi pixel density)  
MemoryBuilt-in8GB built-in  1GB RAM  
CardmicroSD card (supports up to 32GB)  
CameraMain8 MP 3264 x 2448 pixels autofocus LED flash  
FeaturesVideo  
Front2.0 MP Camera  
ConnectivityWLANWi-Fi 802.11 a/b/g/n hotspot  
Bluetoothv4.0 with A2DP  
GPSYes + A-GPS support  
RadioFM Radio  
USBmicroUSB v2.0  
NFCNo  
DataGPRS  EDGE 3G HSPA 4G LTE Cat4 150/50 Mbps  
FeaturesSensorsAccelerometer Proximity  
Audio3.5mm audio jack  
BrowserHTML5  
MessagingSMS(threaded view) MMS Email Push Mail IM  
TorchYes  
ExtraPhoto video/editor Document viewer Maps Gmail MP3/WAV/WMA/eAAC+ player MP4/H.264 player SNS integration  
BatteryCapacity2300 mAh