All OS updates are signed If what you are saying were possible, then all phones would always be susceptible to a man in the middle attack of someone faking apple’s server to send a fake OS update. All this seems to be is a qi charger that has the ability to also turn the phone on / off then it can just connect to apple’s server and update itself like normal.
AWS has multiple teirs of storage options in s3, some replicate and some dont. by default those that do replicate do so in multiple availability zones, but not across regions. unless you turn on cross-region replication (CRR) which is an additional charge.
So, for example without CRR if your bucket is in us-east-1 and 1 availability zone goes down you can still access the data, but if all of us-east-1 is down, you cannot.