Ooredoo and Norway’s Telenor Group last year won telecom licences in the southeast Asian country, whose mobile penetration is about 10 per cent, among the lowest globally.
The TRA said that fraudsters, seeking to illegally obtain personal information, were claiming to be from an authorised national telephone service provider.
Zain’s Iraqi unit was sued by a local telecommunications firm over the $1.2 billion acquisition of rival operator Iraqna from Egypt’s Orascom Telecom in 2007.