Please perform the following steps to troubleshoot problems with push notifications (and/or if you’re having trouble re-establishing a connection to the desktop app or the web client) on iOS:
- Navigate to “iPhone Settings > Notifications > Threema.” Ensure that badges, alerts and sounds are turned on.
- Turn off your phone and turn it on again.
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There’s the option to install the beta version of Threema as described in this FAQ entry.
- As of version 4.8.4: launch Threema, in the settings go to “Advanced > Reregister Push Notifications” and wait for 30 seconds to let the app renegotiate push notifications with the operating system.
- Version 4.8.3 and earlier: open Threema and wait for 30 seconds in order for it to re-negotiate push notifications with the server.
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If only a certain contact is affected by the push issue, please make sure that push notifications for the contact in question are not disabled (navigate to the contact details, scroll down, and choose the option “Off” in
“Notifications > Do not disturb”).
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Also make sure you’re not connected to a Wi-Fi network that blocks the ports that Apple uses for push notifications (try turning off Wi-Fi to see if push
notifications work).
Please note that push notifications have to be delivered using the APNS service from Apple. Threema cannot influence the reliability of this service and cannot solve any issues with APNS. Issues that you notice with push notifications
in Threema might be caused by the APNS service.
If the steps above did not resolve the issue, please get in touch with Apple’s support. If Apple is unable to help, the issue can be resolved by re-installing the app as described in
our guide on advanced push notification debugging as a last resort.
