We got fidonet in Zimbabwe in the early 1990s. It was utterly revolutionary for us - more than the internet that came later really. For the first time we could communicate with my two brothers overseas without paying for extremely exorbitant international telephone calls that lasted a couple of minutes at best.
Our modem was 2400bps (8-N-1 IIRC). We used the zmodem protocol. It was after I learned about computers but I learned a HUGE amount from this about protocols etc. Our phone system was terrible so error correction etc were of great importance. Working out how to dial slowly was also important for our terrible phone exchanges.
It let me keep in touch with my pal, K, who emigrated to South Africa and as a result he ended up sending me 21 1.2MB floppy disks with SLS Linux on them and kernel 0.99 (I think). The journey began! :-)