Simba Telecom's planned Singaporean merger deal with M1 has collapsed, after its deadline for completion was not met.

The proposed deal was first announced in August of last year for an enterprise value of S$1.43 billion (US$1.12bn).

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Reuters reported last week that Singapore's regulator paused its plans to review the merger due to concerns that Simba had been using ​radio frequency bands that it had not been assigned to provide mobile services.

Australian company Tuas, the parent company of Simba, confirmed in an Australian stock exchange filing this week that its agreement to acquire M1 has been terminated.