https://community.o2.co.uk/t5/Pay-Monthly/Upgrade-tariff/m-p/1754736#M283583 <P><U><STRONG>Upgrades</STRONG></U> normally happen within 24 hours</P><P>A change of tariff will be next billing date</P> Sun, 13 Oct 2024 11:25:38 GMT jonsie 2024-10-13T11:25:38Z https://community.o2.co.uk/t5/Pay-Monthly/Upgrade-tariff/m-p/1754734#M283582 <P>If I update my sim only plan does the extra data get added immediately&nbsp;</P> Sun, 13 Oct 2024 11:19:02 GMT https://community.o2.co.uk/t5/Pay-Monthly/Upgrade-tariff/m-p/1754734#M283582 Nikki10 2024-10-13T11:19:02Z https://community.o2.co.uk/t5/Pay-Monthly/Upgrade-tariff/m-p/1754736#M283583 <P><U><STRONG>Upgrades</STRONG></U> normally happen within 24 hours</P><P>A change of tariff will be next billing date</P> Sun, 13 Oct 2024 11:25:38 GMT https://community.o2.co.uk/t5/Pay-Monthly/Upgrade-tariff/m-p/1754736#M283583 jonsie 2024-10-13T11:25:38Z https://community.o2.co.uk/t5/Pay-Monthly/Upgrade-tariff/m-p/1754744#M283586 <P>If you are changing tariff because your data has run out, <a href="https://community.o2.co.uk/t5/user/viewprofilepage/user-id/5688125">@Nikki10</a>&nbsp;- O2 offer one-off data bolt-ons to tide you over until your next month starts:</P><P><A href="https://www.o2.co.uk/shop/all-tariffs/bolt-ons" target="_blank">https://www.o2.co.uk/shop/all-tariffs/bolt-ons</A></P> Sun, 13 Oct 2024 11:38:34 GMT https://community.o2.co.uk/t5/Pay-Monthly/Upgrade-tariff/m-p/1754744#M283586 pgn 2024-10-13T11:38:34Z