Sorry for the spealling mistakes.
I downloaded iTunes from Microsoft Store - version 12.9.3.3
I have an Iphone 6. It says on iCloud that the iphone has a ios 11.4.1 version.
My phone is alternating between "all white screen with apple logo" and "recovery mode screen".
Any other information required?
Well, Brazil does not have the best Apple support stores. They could not fix it. That is why I am trying on the internet.
And one place said something about downgrade itunes version so the phone could "communicate" with the an ios system. The exactly words were "if you want to use iTunes to restore/update to a signed iOS version that isn't the latest, you'll need iTunes older version" (sorry, I have absolutely no idea how this things work)