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"Every time you top up at least £5, we'll automatically text you a Rewards code with a points value."
From what I can see at the moment there isn't a page with the info your directly asking for.
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Current Phone > Samsung Note 10+ 5G _256Gb > Model: SM-N976B.
Samsung One Ui 2.1 / Android 10.
Samsung Gear s3 Frontier Watch.
Samsung Galaxy Buds.