Hello, @LarryRH. Thanks for taking the time to add your question here on the PayPal Community Forum. Not being able to log on to your Zettle account using cellular data is certainly a concern.
Please check the settings in your phone and your Zettle account to make sure the time zones match. When you log on via cellular data (4G), it may appear that you are logging on somewhere other than your actual location and that can pose a problem for the app. As a workaround, please try logging on via secure WiFi.
I hope this is helpful. Thanks for being a part of the PayPal Community!
Sincerely,
Michael
PayPal_Michael
