Can someone please help me. I need to transfer 100k text messages from one contact FROM a galaxy s8 TO an Iphone XR. I don't want to lose them from the Galaxy S8, just copy them to the XR. I am pretty good at phone stuff but I get lost when it gets complicated Thanks
Welcome to iPhone Forums! Afaik, it‘s not possible to transfer messages from an Android to an iPhone, especially from one contact only. If they‘re not too many, take screenshots and save them somewhere.
On my Android phone I use SMS backup pro and it transfers my calls and texts between Android phones .I save them to my Google Drive and restore .BUT you will need to find one that cross platform ..
I think you will need 3rd party apps for that Maybe this article can help you How to Transfer Text Messages from Android to iPhone