[mcw]

Remember - not all phones come with the sticker, and they do fall off.. I had a refurb not come with one, and a friend just brought me a refurb he picked up yesterday so we could flash it up. No stickers covering the antenna slots on the back (completely bare), which was a first that I've seen.

If you REALLY did not drop your phone in water, you have two choices:
1 - Completely remove the sticker from the phone, and if they question it, tell them there wasn't one that you ever saw.
2 - Use the sticker that's on your battery (cut it down a bit to match the one on the phone) and use that.

On one refurb, all the stickers on the back of my phone were worn down completely because unless I placed it on a laptop cooler, the phone would lock up... Well, I have an Antec one, which is aluminum, and because of all the holes, can scratch things if dragged across it... It's not my fault that they have a phone which overheats... But I told them - I could never, ever plug the phone in with the back cover on.

Of course - this all depends on the store/rep that helps you.