after downloading upgrade on my galaxy 5s i cant ee my contacts what can i do to fix this issue

[AC Question]

what can i do to get my contacts back on my phone

 

[Feldon]

There are 41 different models of Galaxy S5. Can you tell us which model yours is?
http://androidforums.com/threads/41-galaxy-s5-models-dummies-guide.892162/

What upgrade did your phone perform?

Have you got your Google account setup to Sync all your contacts from your phone to Google/Gmail?