If the deal between True Corporation Pcl and Total Access Communication Pcl (DTAC) is approved, the new entity would be poised to challenge market leader, Advanced Info Service Pcl.

"The NBTC is waiting for a report from foreign and independent consultants on the economic impact of the deal," said National Broadcasting and Telecommunication Commission acting Secretary-General Trairat Wiriyasirikul.

DTAC is owned by Norway's Telenor ASA and True is backed by China Mobile and Thai agri-business conglomerate, Charoen Pokphand Group.

(Reporting by Panarat Thepgumpanat, Writing Chayut Setboonsarng; Editing by Kanupriya Kapoor)