If you’re using the Gmail app on iPhone and getting the issue of Gmail not responding, you need to apply a couple of troubleshooting check-ups. What you do is ensure that the installed Gmail app is up-to-date and your device’s operating system, whether it is the updated one.
If the issue persists and this time you’ve found that the issue of Gmail not syncing on iPhone, check the syncing feature in the app if it is turned on. At last, you should close the app as well as restart your iPhone. Then, open the app and try doing again the part you were stuck in.

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