memory card: sandisk mobile ultra M2 4GB --will work for eksperia Z , or for samsung 4s/5s?

:smiley:   Hi Elaa,

Dear member of SanDisk Community, welcome.       (2)

Friend, it can check you in a very simple way.

See the official website of the devices in that you are interested, and see in their respective manuals, in the section: specifications, which recommend card.

Luck.

Regards, Alfred.                              (Google translated)