I trust you are well,
Yes, you can insert your MTN sim into a mobile compatible LTE device and use as a hotspot, however, the location that you use the device is locked.
Telkom Sim can be used at any location.
Kindly ensure that the APN is set:
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