My girlfriend has not been able to sync her Samsung S4 mini to her King login since sometime this Fall. Trying to connect to Facebook does not work - it just tries to connect to internet infinitely. Anyway its not an option since my girlfriend does not have Facebook and do not plan to get it either. Synchronization through King login works on the Lenovo Pad she's using, but it is ~100 levels behind, several which are hard to redo. So reinstalling the app on the phone is not an option either if it clears the progress since last sync.
Device has been updated, as well as all apps in play store. Have followed and tried the videoguide from King using both mobile data and wireless.
Related to: https://care.king.com/en/farm-heroes-saga/farm-heroes-saga-has-no-internet-connetion-i-was-logged-in-under-the-king-login#sthash.PrBLgzQz.dpuf