26. What happens with other devices that are synchronized with the mobile device belonging to the same user (Tablets, PC’s, NB), which have the mobile device stolen or lost? Should he perform any action?

User won’t be able to use service even on other devices because all of them requires authentication via mobile device (which is stolen). Probably “bad” guy will be able to use the service, but only in case if he can unlock the phone (biometric, passcode).