How can I remove the little white square on my phone?

[KyAsia]

Hello, I'm the same person, but since I don't know how to add attachments I'm starting a new one under my account. There is a small square and it's quite annoying, I'd like to be able to remove it.

The square above the call app.

 

[B. Diddy]

Thanks for registering on the site! Which phone do you have? That looks like some kind of button to bring up an app manager or a multi-window interface. What happens when you tap it?

 

[anon8380037]

I don't have either device.

I thought it might be the switchable floating Toolbox icon from the S5, (probably a different shape)

but read this thread:

http://forums.androidcentral.com/showthread.php?t=522332