The Northern Irish city and five other UK locations are among today's 5G rollout.
O2 customers in Belfast are among the first in the UK to get access to the company's 5G network after it was switched on today.
As well as the Northern Irish capital, O2 has switched on its 5G network in London, Cardiff, Edinburgh, Leeds, London and Slough.
The Telefónica UK owned company is the last of the UK's mobile operators to launch their high-speed mobile network, with EE, Vodafone and BT Mobile having already done so.
In Belfast, the network will initially be switch on where it’s needed most, including busy footfall areas and the city centre.
O2 intends to have the network live in a total of 20 towns and cities by the end of the year, and 50 by summer 2020.
“Today is a significant moment for our customers and our business as we switch on the O2 5G network," said Mark Evans, CEO, Telefónica UK. "We’re launching with a range of tariffs that make it easy and fair for customers to access 5G, with flexible plans that cost no more than 4G. We’re also switching on 5G in important parts of towns and cities first, places where it will benefit customers and businesses most.
“I believe 5G is going to revolutionise the way people and businesses use mobile connectivity, unlocking huge possibilities for our economy and society. No one in the country has all the answers today, but I’m excited about getting it into the hands of our customers and working with leading partners to help shape the future of 5G for the next generation.”
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