> (minus calling, due to no SIM card)

Could also be due to incompatible radios. 2G GSM isn’t available everywhere anymore (https://en.wikipedia.org/wiki/2G#Phase-out), nor is 3G (https://en.wikipedia.org/wiki/3G#Phase-out).

Might actually be worth something, as there's not that many of them around (especially that work).

Sorry for your loss.