I am curious though, I’m getting the new 13 phone next week and wondered if activating the new one that replaces the old one would have any effect. But probably not, in addition to the phantoms on the iPad there is no sign of any actual tab from the phone even if I have some open. It’s as if everything is syncing between the 2 devices except for tabs. The phone will show open tabs from the iPad but the iPad won’t show any tabs from the phone other than the phantoms.
No, this doesn’t work that way. If you have X tabs on your iPhone, Y tabs on your iPad and Z tabs on your mac, and you buy a new iPhone (or just formatting your old iPhone) the tabs of your newly configured iPhone won’t replace neither the X tabs of your iPhone nor your Y or Z tabs of the other devices. The N iCloud tabs of the newly configured iPhone will appear along with the X, Y and Z tabs.
After a month of not using that old iPhone (wether because you just wiped it or sold it or threw it away) those X tabs will disappear. If you just formatted it and configured it, a month later the X tabs will disappear, leaving you with the N, Y and Z tabs.
Maybe I made it a bit difficult to understand, but the
TL;DR of it would be that a newly configured device (after formatting it) won’t replace the tabs it had with the old installation, those old tabs will remain there along with the tabs of you current installation until, after some time, they will vanish. Same with an old iPhone and a new one, the new one doesn’t
replace your old one. Your only solution to make those tabs disappear is removing your old device from your iCloud account.
I’ve formatted iPhones iPads and macs many times and this is how iCloud tabs behave, when there are no syncing issues of course.