It is understood that M1 is looking for fresh perspective on its media planning.The telco is believed to have been inspired by competitor SingTel's high profile media pitch that resulted in the account being handed back to the incumbent MEC.
M1's creative account is handled by Y&R, which won the business in 2008 following a closed-door pitch.
Last year in April, M1's CEO Neil Montefiore had left the company to join rival telco StarHub as its CEO.
Montefiore was replaced by M1's CFO Karen Kooi Lee Wah who took on the role of CEO, after an extensive internal and external search.