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MTN Group Limited Quarterly update for the period ended 31 March 2021 1 MTN Group Limited ( Incorporated in the Republic of South Africa ) ( Registration number : 1994/009584/06 ) ( Share code : MTN ) ( ISIN : ZAE000042164 ) ( MTN or the Group ) Quarterly update for the period ended 31 March 2021 MTN is a pan - Africa focused mobile operator with a clear vision of Leading digital solutions for Africa's progress . We have 278 million customers in 21 markets and are inspired by our belief that everyone deserves the benefits of a modern connected life . Salient features ■ Group service revenue up by 17.8 % . Group earnings before interest , tax , depreciation and amortisation ( EBITDA ) up by 21.3 % . ■ EBITDA margin improved to 44.2 % ( from 42.7 % ) . ■ MTN South Africa service revenue up by 11.8 % , with an EBITDA margin of 39.8 % ( from 36.6 % ) . ■ MTN Nigeria service revenue up by 17.2 % , with an EBITDA margin of 53.1 % ( from 52.7 % ) . ■ Subscribers decreased by 1.7 million to 277.9 million , impacted by new SIM registration regulations in Nigeria ( ex - Nigeria subscribers were up 3.4 million ) . ■ Active data subscribers increased by 1.3 million to 115.6 million . ■ Active MTN Mobile Money ( MoMo ) customers increased by 0.2 million to 46.6 million . ■ MoMo value of transactions up 86.6 % YoY to US $ 53.2 billion . Unless otherwise stated , financial growth rates are presented on a constant currency basis and are year - on - year ( YoY , 3M to March 2021 versus 3M to March 2020 ) . Non - financial growth rates are presented as quarter - on - quarter ( QoQ , 1Q 21 versus 4Q 20 ) . Service revenue excludes device and SIM card revenue . Data revenue is mobile and fixed access data and excludes roaming and wholesale . Fintech includes MoMo , insurance , airtime lending and e - commerce . Active data users is a count of all subscribers at a point in time which had a revenue generating event in the specified period of time ( 90 days ) prior to that point in time and also during the past 30 days had data usage greater than or equal to 5 megabytes . MoMo users are 30 - day active users .