I had been using Numbers on my iPad and on my iPhone 4. The spreadsheets were synced perfectly over 3G and wifi. However, I just bought an iPhone 4S. The spreadsheets are missing when I open numbers. I've tried the following to remedy:
1.) Checked Settings -> iCloud to make sure that my account info was correct.
2.) Checked that Documents & Data were being synced.
3.) Checked that Settings -> Numbers -> Use iCloud was ON.
I'm out of ideas. I've tried turning these settings off then on again while Numbers had been killed. Still, I see no spreadsheets on the iPhone. I can see them on iCloud.com and on my iPad. What gives?