This me, my personal take on it. Leave fab phone at home and buy a cheap phone.
Cheap phone? No fear of loss.
In the UK you can buy a cheap no contract stand alone sim that works within plan in the EU. - same in the US?
Can an iPhone redirect from your phone to the new number? If not only give new number to essential people.
Tell all family and friends not to get in touch except and only in case of an emergency as you are going on pilgrimage, and if there is an emergency, to text you.
Once each evening switch phone on, check messages, switch off (means you probably won't need a charger).
" No one can have two masters" - Matt 6:24 (as in, at the same time
) - so you cannot be truly 'there', immersed, and still be at 'home' by being in contact with that world/life - I always choose 'there.