Which series of Samsung is best A or M or F or S?

[CYA51s]

Samsung A series has a clear edge over Samsung M series smartphones regarding security. 

The A series is coupled with the Knox security feature that requires a separate hardware component and keeps your data super secure under the hood. 

Another security feature in the Samsung A series is its Secure Folder.

[CYOOI]

Z is flagship foldable phone
S is flagship candy bar phone

[CYA51s]

😄