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Can't log in to FastMail Android app
We're aware of some users having difficulty logging in to the Android app after the recent update.
To help fix the login issue, clear the cache data from the FastMail App on your device. The steps for clearing the cache vary from device to device, so we're not able to offer specific instructions for every system. However, it should be something like this:
Go to your phone's Settings, and tap on Apps (or app management). Choose FastMail App. Now select Storage/Data. Choose "Clear Data" if available or "Clear Cache". If you see both of these options, please clear both.
We apologise for the inconvenience caused by this issue. If you continue to experience problems, please contact Support.