My phone has died, and one problem has become immediately obvious: I cannot order a new phone, because all my debit and credit cards want me to confirm the transaction in the mobile app.

Welcome to 2026. 🙃🙃🙃

I've tried logging into them on my tablet, and I get to various stages of the process depending on the bank, but eventually they either want me to confirm my identity via text message or via the mobile app.
I'm lucky that I'm going to be able to ask my spouse for their credit card after work, but if I was on my own, I'd be kinda fucked. I *could* go into a store, but the only ones that physically sell phones around here are Apple (🥴) or mobile phone providers, which all just really fuck you over with contracts that I don't want.
It's an argument for Yubikeys (or similar), but not a single one of my banks support physical keys. Heck, even the Luxembourgish one, which used to have a physical key, now uses a mobile app.