Many members are confusion regarding M series,Have a knox security or not secure folder are there or not some flashship features are there or not ?
Samsung Galaxy M51 & M31s :- Both phone have knox security but both are run by core ui you can't intstall or download secure folder ,good lock,edge lighting more flashship features .
Samsung M51 really first smartphone phone mini power bank battery 7000 mah and 730G processor and One ui core 2.1
What is knox ? How secure our data?
Samsumg Galaxy m31,m21,m30s
Both above device lack Knox security and also run by core ui you can't intstall or download secure folder via software update because its not only a software also part of hardware above 3 devices lack this hardware
Before buy new phone you in M series first read this post if you want good battery, good camera,good performance go with any one.