O2 has started rolling out a complimentary 5G+ network upgrade to all Pay Monthly customers, but you'll need a compatible phone and SIM card to access the faster speeds ...

O2 said 5G+ is now available in more than 700 towns and cities across the country, and any of its Pay Monthly customers are now receiving this upgrade at no extra cost to their existing bills.

O2's 5G+ network is live in 700 places in the UK, but you'll have to upgrade manually and, in some cases, change your SIM.