I'm preparing for what I'd like to be a smooth transition when my kids open their iPhone XRs Christmas Day. One will be coming from an iPhone 6 running 12.1. That will be fine. The other has an iPhone 5. I just noticed it's running 10.3. If I remember correctly, when I've restored devices from a backup, the backups had to be the same version. Will I be able to set this phone up from a backup? Thanks!