(Telecompaper) MTN Group added 4.1 million new subscribers in the first quarter, ending March with a total of 221.3 million in 22 countries across Africa and the Middle East. That represents a 1.9 percent increase quarter-on-quarter. Active MTN Mobile Money customers increased by 3.9 percent on a quarterly basis to 22.7 million, and mobile money revenues were up 52.4 percent year-on-year. MTN also reported group voice revenue up 5.4 percent thanks to strong growth in Nigeria and Ghana, and data revenue up 26.9 percent as it expanded coverage across its footprint.