How do I reset my Android Samsung phone back to factory settings?

[xarzu]

How do I reset my Android Samsung phone back to factory settings? I do not know how or why or what one of my multiple messaging apps has the bug but I am not able to receive a text message from Facebook to reacquire my Facebook account.

 

[COLGeek]

See here: https://www.samsung.com/us/support/answer/ANS00062029/