Up until now we used device_id and user_id to check for uniqueness, which is not reliable when installation of an app from mixed sources takes place as the device_id might change and the token stays the same. This will result in multiple registered devices and lead to notification duplicates.
Up until now we used device_id and user_id to check for uniqueness, which is not reliable when installation of an app from mixed sources takes place as the device_id might change and the token stays the same. This will result in multiple registered devices and lead to notification duplicates.