The world's tallest building, set for launch in Taiwanese capital city Taipei this week, will boast mobile phone coverage throughout all 106 stories, including the lifts.
Indoor coverage will be provided by Ericsson under contract to Chungwa Telecom to the new Taipei Financial Centre, also called Taipei 101.
The skyscraper is 508 metres high.
Ericsson claimed Taipei 101 would have one of the world's most comprehensive in-building communications setups.
Even the elevators, which travel at up to 1,000 metres a minute, would be covered, the company said.
Its common antenna system would enable different 2G and 3G frequency bands, including GSM900, GSM1800, CDMA800, CDMA2000, and WCDMA, Ericsson said.
Ericsson said it had deployed more than 7,000 in-building solutions in buildings and structures throughout the world.