Also, ALL devices have an issue with SEP where restoring to 12.1.x with 12.2/12.3 SEP will cause your device to reboot on unlock after 2 weeks. We would strongly advise not using futurerestore at all until these issues are resolved. Basically your phone will stop functioning properly after two weeks.
UPDATE: The above warning does not apply if you’re restoring to ios 12.2!