Originally Posted by
RSB54 yep, happening to a lot of folks. there is several suggestions on Microsoft Community but nothing really works. several have done hard resets without success so don't bother. I am still receiving emails on my phone even though it says not sync'd for several days and pops up this error message. missing texts is the most frustrating.
Another bazaar thing is that the notification sounds for my texts (custom assigned for some contacts) also disappeared and/or changed. it all makes no sense.
My emails (and ms account in settings-> emails and accounts) are now syncing after I removed my phone in outlook.com and soft reset my phone. But the sms thing is still not fixed, though I don't have your issue of text tone changing (I haven't assigned custom tones, so maybe that's why). Another annoying thing is now I have two threads for the same person because all recent texts are going to a fresh thread. MS probably changed their text backup system again after doing so sometime last october or november during development of Threshold for mobile.