switching from android to iphone

Hi all unsure if this has been asked before, But I am switching from a Samsung GALAXY S10 Plus to the new IPhone 12 Pro Max. I am wondering what everyone's experiences have been transferring data from Samsung to IPhone and which one works best!? Thanks in advance :)

Our family lives in a rural, mountainous area where cellular reception is spotty at best. It's one of those places where there may be a tower nearby, but the tower is held by a carrier that doesn't use your cellular circuitry so therefore the tower doesn't necessarily help your cell's reception...