In my experience with UK banks & financial institutions, GrapheneOS support can be roughly divided into four types.
None. Explicitly banned. And, though I feel bad for saying it, I can't blame them. If some idiot roots their phone and downloads malware, the bank may be responsible for refunding them. I can see why they don't want that headache.
Some. App works, but some functionality is unavailable. I've got a credit card app which works, but refuses to set up virtual cards or use "remember me". That's good enough for my use. Similarly, I had a merchant account which let me see my balance, but I couldn't use my phone as a credit card reader.
Works, but only in main profile. I'd rather keep financial things in a locked profile. But lots of banks disallow that.
Full. Everything works (although you may need to toggle some exploit protection off).
Some banks are reasonably good at letting you pass on technical queries to their developers - mostly the smaller ones. The nice thing about the UK banking sector is that it is trivial to move banks. So I switched accounts to providers which worked with my phone and let the old ones know why I was moving.
None. Explicitly banned. And, though I feel bad for saying it, I can't blame them. If some idiot roots their phone and downloads malware, the bank may be responsible for refunding them. I can see why they don't want that headache.
Some. App works, but some functionality is unavailable. I've got a credit card app which works, but refuses to set up virtual cards or use "remember me". That's good enough for my use. Similarly, I had a merchant account which let me see my balance, but I couldn't use my phone as a credit card reader.
Works, but only in main profile. I'd rather keep financial things in a locked profile. But lots of banks disallow that.
Full. Everything works (although you may need to toggle some exploit protection off).
Some banks are reasonably good at letting you pass on technical queries to their developers - mostly the smaller ones. The nice thing about the UK banking sector is that it is trivial to move banks. So I switched accounts to providers which worked with my phone and let the old ones know why I was moving.