Many of the terminals in the phones I might use have connectors designed to attach to screw terminals. This makes it a little difficult to attach to a standard Arduino. Â Here is my way to adapt them.
After all that, you can strip the end of the exposed wire, and use it with a regular Arduino, or as I did, with a Boarduino.
In retrospect, it probably would have been a good idea to take some sandpaper to the connectors to remove some of the oxidation. Â However, these won’t be carrying high currents, so the connections are good enough.