The only issue I know is that users often expect the same range or distance they get with their laptop. Seasoned users or engineers don't expect that.
What issue are you writing about?
I think I would like the screen better on the One X. Still unsure which camera is better both are good. The main issue I have with the One X is that it still may have wi-fi issues and the battery is internal. On the plus side its a solid build due to unibody construction.
The S3 on the other hand has a dimly lit screen but produces deep blacks and some vivid colors (?). The battery is larger and storage can be upgraded. Camera also seems good. I also like the S Voice feature which will probably improve in the future. The S3 also doesn't have any wifi problems.
It's a toss up between the two and I'm torn. Can any one list some more reasons why I should go with one or the other?
Main reasons for a smartphone for me:
1. Camera (old Pentax is only 5 megapixel and takes 320p video)
2. Features (S Voice, etc.)