It is true that the EU has announced Green Cards are being scrapped but the only timescale given so far is “within weeks”. Remember that Green Cards are in use in a number of countries other that the EU and even beyond the EEC.

Looks like it is happening now https://www.theguardian.com/money/2021/j...orthern-ireland

We've just received written confirmation of full vaccination. In Wales the NHS app is different and I couldn't get it to work on line. However, after ringing them we got the evidence in a couple of days - quicker than the 10 working days they warned of. I think in England the evidence is on the NHS England app.

It is if your phone is modern enough to have the right software. My 2 year old Samsung is fine all my covid details there. My wife using my old iPhone6 (she hardly uses a phone hence the hand me down) cannot even download the app as the out of date phone doesn't have the correct operating system.