The UK's digital switchover is set to be completed later, five months ahead of the original deadline.
Engineers are expected to sign off on work in the north-east of Scotland and the Western Isles, paving the way for more 4G super-fast mobile networks.
The spectrum was previously used for analogue TV. More than 270 transmitters have had their signals realigned.
Despite the achievement, most of the UK's networks have yet to set a date for the launch of their 4G services.
At present, EE is the only firm with a fourth-generation network in the UK.