Silent Switch First Timer!!!

So I am currently using a refurbished iPhone 3G, it was a replacement after a broken screen iPhone 3G. Now this refurbished one has a broken silent switch. It's gone couldn't find it, it's so small. But anywho, if i go to the apple store tomorrow do they just put another one back on this current one? Just curious because i don't wanna go through putting the screen protector back on I want to use this same one there is nothing wrong with it at all besides the silent switch. Or will they just give me a whole new phone or another refurbished