Broken iphone 4 lock button? - 1

So the lock button on my phone appears to be working without me touching it. It hung up my calls, keeps locking my phone, and even going to the "slide to power off" screen. I also can't seem to use the volume keys. It could be slight water damage, the phone was never fully submerged but it got some drizzle on it.

That could be the reason. Have your buttons replaced or just sell your iPhone 4.

Hi

What you are describing is common to moisture or water damaged iPhones. You will need to get it to a repair shop As soon as possible so they can clean out the moisture. I have included a link to a page which details information on what should be done if you suspect water damage to your iPhone.