My cyan 920 makes the same creak/pop when pushing down on the top right corner (above the word NOKIA) on the screen. It's getting worse. I went into my local AT&T store. They were "shocked" to see such a problem. I walked the salesperson over to their two 920s on display and both had my problem. However, the salesperson's 920 was rock solid. It's frusterating. They won't fix/replace it, and it will just get more loose over time.