Can I keep my UK number when using a travel eSIM?

Yes. This is one of the biggest advantages of eSIM technology. Your physical UK SIM stays in your phone and remains active for incoming UK calls and SMS. You simply use the Jolli eSIM for data. In your phone settings, set Jolli as your 'Primary Data' line while keeping your home SIM enabled for voice. You can receive your bank 2FA codes and calls to your UK number without any issue.