15 awesome things you didn't know your Android device could do

1. Play media stored in your phone / computer / YouTube on your Smart TV using DLNA apps. Even stream to Apple TV using AirPlay with AllCast.
2. Mirror your mobile screen to your Smart TV using MiraCast (wireless) or MHL adapter (wired).
3. Connect your mouse, keyboard, gaming controller to your mobile using OTG adapter.
4.  Charge another mobile using an OTG connector.
5. Connect Large Hard Disks (ex 2 TB HDD) using a powered USB hub connected to your mobile using an OTG cable.
6. Watch Digital Terrestrial Television on mobile on the go using a DVB-T2 adapter (without using any internet bandwidth)
7. Turn your phone into a Metal Detector (app Metal Detector), Monitor Heart Rate by just using Camera ( Instant Heart Rate Monitor), Decibel Meter(Sound meter), measure distance (smart measure), Measure Lumen output of bulbs (Lux Meter), measure Speed (gps speedometer), altitude, use it as a compass(smart compass)
8. Surveillance device with movement detection (IP Webcam).
9.  Use as a wifi-repeater / extender (FGRouter)
10. Place it in a VR Headset and watch 360 degree videos on YouTube (gyro sensor should be present in phone) or watch SBS 3D movies. 
11. Use it like an Activity and sleep tracker using Google Fitness app
12. Customize your phone's appearance using third party launchers. Deploy Custom ROM'S, Dual boot, Run Linux, etc.
13. Use it as a torch.
14. Detect infrared light using camera to check if remotes are working.
15. Of course, call and text people as well.😂😀😀