Smartphones have essentially all but replaced other methods of communication, but there are times when having access to a ham radio could be a lifesaver -- especially during disasters. Well, there is a way to take an Android phone -- perhaps an old one that you have tossed into a drawer -- and transform it into a fully-functioning ham radio.

However, if you think it's as easy as downloading an app, I'm sorry to tell you that it's a bit more involved. The good news is that you can build it for about $35.

The project, called kv4p HT, is a homebrew VHF radio that is capable of both voice and text communication. 

Note that to use this legally in the US you will need a level 1 Technician class license, details of which you can find here. 

To add ham radio capability to your Android smartphone, you will need a few bits. 

You will also need a custom printed circuit board, and you will need to be able to solder. If you need a case for the radio, there are 3D print files available.  

Oh, and you'll need an Android smartphone with a USB-C port.

The site has comprehensive instructions on building the radio and flashing the firmware, along with a Discord channel, so someone is there to help you along the way. 

The phone's battery powers the ham radio, and the power draw is quite low, but the radio can be physically disconnected by removing the cable. 

For a deeper dive on how ham radio is still used today, check out ZDNET's Steven J. Vaughan-Nichols' article: How ham radio endures - and remains a disaster lifeline - in the iPhone era.