13-10-2024 12:19
If I update my sim only plan does the extra data get added immediately
13-10-2024 12:25
Upgrades normally happen within 24 hours
A change of tariff will be next billing date
13-10-2024 12:38
If you are changing tariff because your data has run out, @Nikki10 - O2 offer one-off data bolt-ons to tide you over until your next month starts:
https://www.o2.co.uk/shop/all-tariffs/bolt-ons
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