I trust you are well
Yes, the ZTE (MF920V) which is a CAT4 device is supported for Cell C Fixed wireless LTE.
Please ensure that you check coverage 1st: https://www.afrihost.com/landing/fixed_wireless/#fixed-wireless-availability
You will be able to top up once the Data is depleted.
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