Securing A Travel iPhone by Filippo Valsorda.
From the post:
These are dry notes I took in the process of setting up a burner iPhone SE as a secure travel device. They are roughly in setup order.
I believe iOS to be the most secure platform one can use at this time, but there are a lot of switches and knobs. This list optimizes for security versus convenience.
Don’t to use anything older than an iPhone 5S, it wouldn’t have the TPM.
Needless to say, use long unique passwords everywhere.
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There are more than forty (40) tasks/sub-tasks to securing a travel iPhone so you best start well ahead of time.
No security is perfect but if you follow this guide, you will be more secure than the vast majority of travelers.