(Telecompaper) MTN Group has raised its full-year subscriber guidance, saying that it plans to add 17.5 million net subscribers this year, compared with previous guidance of 17.25 million. It said growth in its domestic South African market helped offset contraction in its largest market, Nigeria. The MTN customer base grew 2 percent to 219 million in the three months to September. Performance was hit by continued aggressive competition and stringent regulatory requirements, CEO Sifiso Dabengwa said. The improved outlook is based on improved customer growth in South Africa, Cameroon and Iran, offset by weaker results in Nigeria.