Similar: What can be backed up?
I've read the above question, but the information is over two years old and doesn't specify a phone OS version. I'd like to see an updated list here, specifically for Windows Phone 8 versions. This currently includes 8.0 and 8.1, but should be updated later for any future releases. The following items should be covered.
- Phone Call History
- Installed Apps
- OS-level Settings
- App-specific Settings
Please add to the list if there is anything important I have missed. Also, when there are prerequisites for a particular item to be backed up (e.g.: possible in 8.1, but not 8.0) please specify such.
If you are aware of any StackExchange questions or online guides for backup/restoration of a particular item, please include links. (This question is more about "what" than "how", but links to and/or short summaries of "how" are greatly appreciated.)