Go to Solution.
It may take a few days (or your next billing date) to update on the app.
If you have had a text to say it's been applied then you will be fine.
*The Game Is On*
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You will be fine @Jay9
It will show as a bolt on in your MyO2 when active but it doesn't usually become active until after your first bill.
Guide: Where is my discount or Extra Data?