Nigeria, May 31 -- Nigeria's advertising regulator has opened an investigation into 9mobile over an alleged N1 billion unpaid debt for advertising services, following two formal complaints from industry stakeholders.

The Advertising Regulatory Council of Nigeria (ARCON) said the petitions were filed against Emerging Markets Telecommunications Services Limited, which trades as 9mobile, by members of the Advertisers Association of Nigeria (ADVAN).

It disclosed this on Friday in a press statement signed by ARCON Director-General, Olalekan Fadolapo.

The agency alleged that 9mobile continued to run its advertising through new agencies despite owing several others for past work.

"It was also alleged that while 9mobile refused to pay or reso...