Some Taiwanese 4G operators have urged regulator NCC to require operators to fulfil the commitments made in their business plans before allowing a merger.
Taiwan Star Cellular and Chunghwa Telecom are also pushing for regulations requiring operators not to change their core systems without first notifying the NCC, the Taipei Timessaid.
The NCC held the healing to address controversy over the proposed merger between Asia Pacific Telecom (APT) and Ambit Microsystems.
Rival operators have objected to the proposed plan, and an investigation by the NCC found that APT had been using Ambit's core network even though its business plan stipulated building its own.
APT has also been using circuit-switched fallback for voice - rather than VoLTE as specified in its business plan - without informing the NCC.
The report cites Taiwan Star law affairs department vice president Leo Fang as stating that the NCC should fine APT and require the company to meet its business plan commitments before approving a merger.
The NCC has already previously denied a license renewal for Wimax operator Tatung Infocomm for failing to deliver on its business plan.
In January, the regulator turned down the initial merger proposal betweeen APT and Ambit Microsystems after finding that the application did not give sufficient information about the scope and methods of the deal.