Tesco Mobile uses the O2 network. This means you get 4G coverage across over 99% of the UK and a decent scattering of 5G coverage as well, although, like other networks, O2 is still rolling out its 5G so it is not as widely available as 4G.
Read moreWhere are 5G areas in UK?
As of June 2020, they have 5G in 80 cities and towns including Bristol, Coventry, Glasgow, Leeds, Leicester, Liverpool, Newcastle, Nottingham and Sheffield . The UK’s biggest mobile network has said that it expects 5G customers to experience an increase in speeds of around 100-150Mbps, even in the busiest areas.
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