An update to my 620 & 920 problems
620
Problem: Find my phone doesn't show two checkboxes. Only one slider to turn on and off. For those that do not know what I'm talking about,
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Solution: I backup and hard reset the phone. Then I restore. The settings now appears.
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920
Problem: Low light shots seems to degrade.
Solution: After comparing shots taken by other 920 and doing some more tests, it appears to be the pictures are on par. Although I do really feel that the quality degraded a little, since it's on par with other 920s, I'm going to put it to rest.
On the other hand, I find the restore phone function of windowsphone works well but with some annoyances.
1. I put msia as my home region and it restores apps available to msian market automatically. Fantastic

2. For non-msian market apps, it doesn't show the app icon and app name. It just shows "Downloading application.. some numbers.". Tapping it just gives some generic error message. Even when I change the region to US, it still displays that. I had to tap retry.
3. After changing to US region and downloading US apps, I still have some apps that I cannot download. After counting the number of apps and counting the number of "nokia system apps(audio, extra+info etc)" in the windowsphone.com, I guess these are the apps. But I'm not sure since I cannot see the icon or the name.
Yes
omg, me also dont have two checkboxes..
not using data plan anyways, lol..