Originally Posted by crackjack

Doesn’t Apple give it 30 days after switching SIMs before deactivating the original phone number? At least that’s how it works for my physical SIM + eSIM iphone… it warns me that I will lose access to that number with iMessage (though iMessage is still tied to my email address).

Also, I believe I can pop the main SIM back in every 20-ish days or so to keep the number live with iMessage (provided I have cellular / SMS service on that SIM wherever you are roaming to, as a (roaming) SMS needs to be sent, I believe).

I would have thought it would it work similarly for eSIM-only iPhones?