iPhone SE 1st generation and Apple Watch SE 3
Can I use iPhone SE 1st generation to activate standalone (separate line) Apple Watch SE 3?
iPhone SE, iOS 18
Can I use iPhone SE 1st generation to activate standalone (separate line) Apple Watch SE 3?
iPhone SE, iOS 18
No. You will need a phone running iOS 26. And yes, an iPhone SE 3rd gen will work.
P.s. If not - Will iPhone SE 3rd generation work?
iPhone SE 1st generation and Apple Watch SE 3