You'll have to change it often if you're worried about safety at all. Lineage has been keeping my phone alive for five years now, and although it only updates t

You'll have to change it often if you're worried about safety at all. Lineage has been keeping my phone alive for five years now, and although it only updates the upper layers and there are definitely unfixed vulns in the firmware, it's much better than if I'd used the stock OS that hasn't been updated since the beginning of 2020. Banks don't or won't understand this.