In the next 6 days? Lol

Ask the same question again Jan 1 for a better answer :)

haha

My email flooded with "Loss of Registration"... Are there any settings to prevent this loss of registration on the phone side?

Turn off notify when unregistered in Monster UI?

fink: My main concern - how to decrease it? I'm assuming every 320 seconds phone re-register. But why do I see this loss of registration error? Should I increase interval of registration or something else?

mentax: Different possibilities for that to happen. Your phone may not be sending the re-REGISTER request before the current one expires. Maybe device is being provisioned and the credentials being flushed as part of that provisioning. Maybe you have a cluster configured and the device is registering to a different Kamailio server sometimes when it re-REGISTERs.