Xiaomi Redmi 4 Prime ($ 0)

Features:
Audio3.5mm audio jack, Speakerphone

Specifications:

BuildOSAndroid OS, v6.0.1 (Marshmallow)
UIMIUI 8
Dimensions141.3 x 69.6 x 8.9 mm
Weight156 g
SIMDual-SIM
ColorsGold, Dark Gray, Silver
Frequency2G BandSIM1: GSM 850 / 900 / 1800 / 1900
SIM2: GSM 850 / 900 / 1800 / 1900
3G BandHSPA
4G BandLTE
ProcessorCPU2.0 GHz Octa-Core Cortex-A53
ChipsetQualcomm MSM8953 Snapdragon 625
GPUAdreno 506
DisplayTechnologyIPS LCD capacitive touchscreen, 16M colors, Multitouch
Size5.0 inches
Resolution1080 x 1920 pixels (~443 PPI pixel density)
MemoryBuilt-in32GB built-in, 3GB RAM
CardMicroSD card (support up to 256GB) (uses SIM 2 slot)
CameraMain13 MP, autofocus, dual-LED + dual tone) flash
FeaturesF/2.2, phase detection, Geo-tagging, touch focus, face/smile detection, HDR, panorama, Video (1080p@30fps)
Front5 MP, f/2.2, 1080p
ConnectivityWLANWi-Fi 802.11 a/b/g/n, Wi-Fi Direct, hotspot
Bluetoothv4.2 with A2DP, LE
GPSYes + A-GPS support & Glonass, BDS
RadioFM radio
USBmicroUSB v2.0
NFCYes
InfraredYes
DataGPRS, EDGE, 3G HSPA, 4G LTE
FeaturesAudio3.5mm audio jack, Speakerphone
BrowserHTML5
MessagingSMS(threaded view), MMS, Email, Push Mail, IM
Gamesbuilt-in + downloadable
TorchYes
ExtraFast battery charging, Active noise cancellation with dedicated mic, Photo/video editor, Document viewer, Google Search, Maps, Gmail, Document viewer, DivX/Xvid/MP4/H.265 player, MP3/WAV/eAAC+/FLAC player, YouTube, Google Talk
BatteryCapacity4100 mAh
- Non-removable