If you notice that your Android phone is no longer properly syncing your Exchange Calendar events, please follow the instructions below to re-synchronize your calendar … How to Fix Google Calendar Sync Issues on an iPhone or iPad Re-add Your Google Calendar Account. There’s no cloud storage, so your information never leaves your devices, and it keeps everything up to date with no work on your part (after the initial set up). 4) Tried a manual configuration of the account (Exchange, IMAP) 5) Reset my phone. A simple reboot is the first solution that you must try to fix the calendar app not working on Samsung S10. Is your address right where it says Google and is it toggled On.