Question: who offers esim in uk?
Answer: eSIM is available from selected carriers. You'll either need to have a carrier's app or a QR Code you can scan. Again, the carrier will need to support eSIM. In the UK, EE, O2 and Vodafone support eSIM, although Vodafone is currently only supporting it for Apple Watch Series 3, 4 or 5 Cellular.