Lenovo S90 ($ 246)

Features:
SensorsAccelerometer Proximity  

Specifications:

BuildOSAndroid OS v4.4.4 (KitKat)  
Dimensions146 x 71.7 x 6.9 mm  
Weight129 g  
SIMDual-SIM Dual Standby Micro-SIM  
ColorsWhite/silver gray pink soft orange blue  
Frequency2G BandSIM1:GSM 850 / 900 / 1800 / 1900
SIM2:GSM 850 / 900 / 1800 / 1900  
3G BandHSDPA 900 / 2100  
4G BandLTE band 1(2100) 3(1800) 41(2500)  
ProcessorCPU1.2 GHz Quad-Core Cortex-A53  
ChipsetQualcomm MSM8916 Snapdragon 410  
GPUAdreno 306  
DisplayTechnologySuper AMOLED capacitive touchscreen 16M colors Multitouch  
Size5.0 inches  
Resolution720 x 1280 pixels (~294 ppi pixel density)  
MemoryBuilt-in16/32GB built-in  1/2GB RAM  
CardNo  
CameraMain13 MP 4208 x 3120 pixels autofocus LED flash  
Features1/3.2' sensor size 1.4µm pixel size geo-tagging touch focus face detection HDR Video 1080p@30fps  
Front8.0 MP Camera LED flash  
ConnectivityWLANWi-Fi 802.11 b/g/n hotspot  
BluetoothYes  
GPSYes + A-GPS support  
RadioFM Radio  
USBmicroUSB v2.0  
NFCYes  
DataGPRS  EDGE 3G HSPA 4G LTE  
FeaturesSensorsAccelerometer Proximity  
Audio3.5mm audio jack  
BrowserHTML  
MessagingSMS(threaded view) MMS Email Push Mail IM  
GamesBuilt-in  
TorchYes  
ExtraPhoto viewer/editor Active noise cancellation with dedicated mic Voice memo/dial MP3/WAV/WMA/eAAC+ player MP4/WMV/H.264 player  
BatteryCapacity2300 mAh