s5 lock issues

Is the phone company issued? It's normal for companies to disable non secure features on devices they issue.

 

So where did you get it from? You'd have to know where it came from it the first place. Did you buy it off eBay?

 

Then you could try going back to them and use the warranty to get it replaced.

 

Wait, did you encrypt the phone? You can't be encrypted and have an unsecured lockscreen.