is it possible to handle the beacon signal when the smartphone is in the standby modus?
According to my information it is possible to define 15 beacon (about the mac id) which signal can handle from the smartphone in standby modus.
But this only work in iOS.
Is there any other solution? Also for android?
Both iOS and Android allow you to be monitoring for beacon regions in the background. Additionally, iOS can also do it even if the app is shut down completely. It's explained here: https://community.estimote.com/hc/en-us/articles/203253193-Launching-notifications-in-iOS-when-the-app-is-killed
Please also note that MAC addresses are never used for monitoring. It's always beacon ID (UUID, Major and Minor values) - you can read more about it here: https://community.estimote.com/hc/en-us/articles/203776266-What-is-a-beacon-region-