Two PETN bombs were found last night. One was hidden inside a laser printer toner cartridge. The bombs were reportedly sent from Yemen to USA on board regular freight planes.
The bombs were equipped with a detonator connected to a mainboard and a battery taken from a regular mobile phone. Apparently the bombs would have been detonated by calling the phone, triggering the ring vibrating motor, which would detonate the PETN inside the cartridge. Alternatively, a calendar alert set in the phone would trigger the vibrator as well.
So, which phone was it?
Based on the picture of the board, it's most likely a Nokia 6120 Classic.
Compare the image of the PCB connected to the bomb (top) to an image of a spare part 6120c mainboard (bottom):