Get a big tech second phone. Cheapest available. Just perform the needed tasks and use your Libre phone for everything else.
Does anyone remember having a copy of internet explorer that the bank required (or chrome these days) but using firefox for everything else? Apply that concept to a phone.
For people without a viable alternative such as transferring their funds to a bank that does not require Google/Apple certified devices, this seems to be the way. The second phone does not even need to have a SIM card in it, except perhaps during set up. That phone does not leave home and is ideally be powered off with its battery removed when not in use. Everything else can be done on a free device, ideally using FOSS apps. Ideally again, this means no Facebook, no Whatsapp, no IoT crapware.
Luckily, here in the U.S. this is still possible. I run Graphene on a Pixel without Play Store compatibility layer and everything just works. Most of my apps come from F-Droid, with the notable exception of Whatsapp, for which a standalone APK is available. Unfortunately, it is proving difficult to get rid of Whatsapp entirely because of friends and family.
Yup. Right now that's something running graphene for me. I'd prefer full linux but the other options don't seem viable yet to me. When I tried the pine phone a few years ago its battery life was in the 3-5 hours range if I used the phone which is not sufficient.
Some banking apps require relatively new OS, so if you have an old phone with e.g. Android 8 and you can't upgrade (Android 9 removes certain important features), you are out of luck.
But then I would need to constantly charge two phones and keep two phones in my pocket all the time because I never know when I would need to do those things on the go.
I recently added a second phone for secure comms (Graphene). The biggest hassle turned out to be moving data between them. For that I settled on running my own Matrix server.
> You check your banking apps multiple times each day with the frequency and unpredictability expected from messaging apps?
I almost do, yes. Life's complicated, I use several bank and credit card services a day. I'm not at home at suitable times for my banking needs. And payments for purchases sometimes require confirmation in real time via phone app.
> If not that frequently or unpredictably then you could just plan to use your laptop for banking some time during the day.
I used to do that years ago back when it was an option.. But these days, 3 banks I use (two for business) require using their mobile app to authenticate login on a laptop browser. There's no other option.
One of the card apps I have to use often won't even run when Android developer mode is enabled, which is quite annoying.
Does anyone remember having a copy of internet explorer that the bank required (or chrome these days) but using firefox for everything else? Apply that concept to a phone.