Broken lock button on iPhone

Ok so the lock button on my iPhone is like jammed or broken? So I have the assistive touch, but it's really annoying! If I send it to apple will they send me a whole new phone? If so, how long will it take for them to send me a new one? (I live in canada)

Is there an apple store near you to take it to? I do think they will just give you a new one.