I somehow solved it (my contacts appeared again) with the SYNC function from my Nokia Account... BUT still don't know what did I do that created the issue, twice in two weeks.

Nevertheless, I still have issues with my homescreen feeds from Facebook (three days old at least), I need to clean with QAD every time I intend to use the camera, I can't open to read a *.TXT file, couldn't get my messages and calls records back, can't make whatsup work, the battery is draining fast, while I currently keep my N9QTweak updated (current v 9.8.0) without tweaking anything, I couldn't get the required EE tweak in order to change the FasterN9 v 1.1.5 setup with the new safer method from Coderus.

Did I read that I should reflash, as in going throught the PR1.3 Process again?