Chosen Solution
I have a smashed iPhone 6 with a lot of things (photos, videos, apps, etc) stored on that phone that i really don’t want to lose. Unfortunately I haven’t done any iCloud backup recently. My question is: can I swap a logic board from a dead device into the working one (same model: iPhone 6, same memory size)?
An iPhone logic board in essence IS the phone itself, everything is soldered onboard and self including. The only way to get back your data without a backup is to repair, at least partially, your iPhone.
check this video it might help you . Basically it depends of the kind of damage https://www.youtube.com/watch?v=58-7cg9c…