Questions about updating iPhones via MDM and how to update mobile device inventory aftrer an update?

Honored Contributor
  1. From people's experiences, how long does the "download and install iOS update" command take to go through successfully?

  2. For iPhones, how have people gone about scheduling the devices to be updated? Ideally people would do it on their own, but there's always stragglers. What tends to be the best time to schedule the update? Would it be at night? Would it be during the day? I'm trying to keep in mind the potential for alarms not getting activated after an update is performed.

  3. Is there a way to have the "Update Inventory" command queued up after an update has completed? How do folks deal with that?

  4. What's the best way to ensure a successful "download/install update" to go through? Any certain criteria you look for when targeting devices?