I trust you are well,
Kindly note that adding Afrihost Month to Month Data only deal will not affect your MTN contract, However, you will need to change your APN to Afrihost and back to MTN as desired.
Kindly have a look at the below link regarding APN:
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