Galaxy S5 still VERY slow and lagging, even after factory reset?

[Allison Karel]

Hello, I just installed a new update on my Galaxy S5 two days ago. After it installed, the phone started being extremely laggy and slow. I backed everything up and did a factory reset. That didn't help, so I did another factory reset. Its still SO slow. Is there anything else I can do to make it faster? The lack of speed is driving me CRAZY!! Thanks in advance!