https://naija247news.com/2021/03/25/africa-mobile-customer-satisfaction-connected-consumer-report-2020-mobile-market-leaders-in-egypt-nigeria-and-south-africa-performed-better-than-smaller-operators-in-2020-in-terms-of-nps-researcha/
Africa Mobile Customer Satisfaction Connected Consumer Report 2020: Mobile Market Leaders in Egypt, Nigeria and South Africa Performed Better Than Smaller Operators in 2020 in Terms of NPS - ResearchAndMarkets.com