Cheap headset + broken cellphone = "SkypeCell"

Step 4 Connecting the speaker

I will assume that you now have a dismounted cellphone (PC boards exposed) and a green 3.5mm jack with 2 wires connected.

Solder the 2 wires from the plug on the speaker's PCB connections.

At this time, you can test this half-finished project by plugging in it in a PC. If you can listen phone-quality music by holding the speaker near your ear, it's good!