“But which smart phone is best for privacy?
The one that you only use for phonecalls.”
I only do phone calls and texting on my A51. Internet banking? I only do this on my at home legit and protected computers and laptops. I will never do this on a phone.
I only do banking in a bank machine.
If I did internet banking, it would be on an inexpensive, but new computer that I would only use for internet banking. I Would not surf on that computer or do emails, except maybe bank emails.