Good day Peter,
Apologise for the inconvenience, please will you check the network coverage of the address/ area your son in living and using the sim card.
Be sure to select the correct network on the right-hand side of the map and enter the address to search. - https://www.afrihost.com/resources/network_coverage_map/
How to check if you have Mobile coverage - https://help.afrihost.com/topic/afrihost-mobile/how-to-check-if-you-have-mobile-coverage
If you require further assistance,
please send a message to our WhatsApp helpline: https://whatsapp.afrihost.com
or visit our Help Centre: https://help.afrihost.com/
or see our FAQ page: http://faq.afrihost.com