The National Broadcasting and Telecommunications Commission (NBTC) will suspend the auction of 10MHz of bandwidth on the 850MHz spectrum (upload and download).
Takorn Tantasith, secretary-general of the NBTC, said the agency will suspend its auction plan for the 850MHz band by June this year.
The 850MHz spectrum band is part of Total Access Communication (DTAC)'s concession, due to expire in September 2018.
Mr Takorn said the regulator is concerned about interference with communication signals between DTAC's 850MHz slot and an adjacent slot NBTC allocated earlier as a radio communication signal for the government's high-speed railway project.
"It is too harmful to allocate the 850MHz spectrum for mobile service, even though there has not been signal interference between the 850MHz and the adjacent slot yet," he said.
Mr Takorn said the move to suspend the auction and redesign the spectrum slots for the 1800MHz auction will be submitted to committee on Jan 25 for approval and to the board on Jan 31.
