This app could inject your Switch bin by using USB cable with your Android Mobile. 
Note:
The Injection need a OTG cable to connect your phone and NS, so you have to buy a correct one
The app doesn`t include bin file, please find it by yourself and put it in your storage
The injection might fail if the cable or phone don`t support the injection. Change another mobile phone or cable might fix this problem, but the app cannot do any fix right now.

If you have any issue, please join in my telegram group
https://t.me/nxloaderrb

You also could give a star or report an issue in the github page:
https://github.com/huhao1987/NXloaderRB
Cheers.

The NSloaderRB is an app which could inject Switch through USB