BB Curve :: 8520 Key Broke And Phone Is Not Responding?

Recently I purchased a blackberry curve 8520. The phone worked great and was one of the best phones I had ever used. But now it doesn't seem to respond anymore. The only way to get into my phone when turned on is to push the switch off button for about 3 seconds and then the phone will ask me to unlock it. This is kind off annoying because I'm not used to using the phone like this. I don't know how this happened. The only reason I can think of is that a few weeks ago I was pushed and I hit a wall with the phone in my pocket, this broke my g-key. The key did not fall off it just stopped functioning. This used to annoy me too but I learned to live with it. My question now is, will blackberry still repair the phone if I send it back ?