I just want to confirm, if Apple DEP account is part of the pre-requisite to manage iOS devices. As the APN service required the DEP account so successfully generate the certificate to configure the APN settings on the Hexnode.
As for Business Container what are the general limitation for Unsupervised device (BYOD) for iOS? Is it base on this link below?
How to Setup Business Container for iOS Devices – Hexnode Help Center