I hadn't heard of Airtime rewards until recently but it's so good, you basically link your cards to it and then you earn cashback which you can claim off your phone bill when shopping in certain shops like Boots, Wilko, Newlook and loads more.
In the last week I've earnt £5 off my phone bill already just from my usual shopping!
Join @airtimerewards and get free credit using my code XTH3K8KN airtimerewards.app.link/friend