Going to become one of these a-holes with 2 phones
Just bought a Moto G6 on Project Fi, cos I am sick of the crap coverage where I live, and with this, I can get good coverage as it switches between various networks. Plus I don't actually phone and text a massive amount, so cost wise, this is about as good as it gets, $20 per month plus data as you use, and data in pretty much every country without roaming chargers.
But I can't and won't give up my Oneplus 5T
I can use that when i am in the UK anyway, as it has my EE sim in there, plus I love the screen on it, so will continue to use over wifi for watching Netflix etc.