Little-known NFC Tag uses and unique ideas
Give access to your Wi-Fi network
If you'd like to give guests at home (or at an office) access to your Wi-Fi network without giving up your password, check out InstaWifi. The free Android app lets you program an NFC tag that, when tapped with an NFC-enabled device, gives the phone or tablet instant access to the associated Wi-Fi network.
Auto-start timers
How many times have you loaded the washing machine, walked away, and completely forgot you were doing your laundry? Put an NFC tag next to your washing machine and dryer that, when tapped, fires up a timer.
Quickly pair with a Bluetooth keyboard
I asked for your ideas on Twitter and user @litcritter suggested sticking an NFC tag on the back of a portable Bluetooth keyboard. Tap once to enable Bluetooth, and tap again to disable it when you're done typing. Neat idea!
Prank your friends
The least practical, but arguably the most entertaining application of NFC tags is for pranks and rickrolling. If an NFC tag that contains a link is scanned, the Android device will not ask for permission before launching the browser. Scary, right? Questions regarding security come to mind, but can you imagine the possibilities? Fellow CNETer Jeff Sparkman suggests, "Program an NFC tag to open YouTube and play the video for "Never Gonna Give You Up." Hide tag near your target. Hilarity ensues!"
The most practical, creative ways to use NFC with your Android device | How To - CNET