Hi, first you will need an Afrihost or MTN sim card, no other network will work with these settings. Delete all your APN settings and follow these step by step guide for your device: http://www.afrihost.com/landing/mobile/apn/
After you have enetered all the correct information, please restart your device, open your internet browser app and test your APN at http://support.afrihost.com/ip/ on your device itself.
For more frequently asked questions and answers, please see https://www.afrihost.com/site/faq/apn_access
Hope this answered your question, if it did, please mark as the correct answer for the next viewer. Thanks! :)