Use USwitch to upgrade to a cheaper sim only tariff. https://www.uswitch.com/mobiles/compare/sim_only_deals/o2/ Choose the deal you want This will automatically redirect you to the O2 website Just follow the prompts and choose the UPGRADE option Complete the deal and nothing on your account changes except the tariff at the new cheaper cost Payment date is the same and your next bill will be at a cheaper rate and will be made up of the pro rata cost of your old tariff and your new tariff The change should show in My O2 within 24 hours Volt benefits will still apply as will possibly a 3 month extra such as Disney+
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