Same! It started for me shortly after the iOS 15.4 update. I factory reset my phone twice, turned on and off iCloud, had to re-sync everything across iCloud so many times. Back and forth between T-Mobile support and Apple engineering. Finally, when it started popping up on forums I tried to walk a T-mobile tech through the process of removing and re-adding the e-sim but the stupid QR code to re-add this sim refused to come through either by text on my wife's phone or email! Finally gave up and just went into the T-Mobile for a physical sim about a month ago and it worked. Maybe I'll try e-sim again in a year but that was ridiculous.I guess I was cool before it was cool.
I am on T-Mo with eSIM and had the iMessage activation issue way back in February. Had hours of calls/troubleshooting with Apple Support, even had it escalated and a case opened with Engineering, and they could never figure out why it wouldn't work.
About a month ago, I had the crazy idea to transfer my eSIM to the second number on my work phone to see if it would work there. It was actually pretty easy, since they are both on the same Apple ID and all I had to do was choose add plan on the other phone and it moved it from phone number one.
After moving the eSIM back, I have not had a singe iMessage or FaceTime activation issue.
It's not easier because now you have two points of failure, Apple's servers and the carrier. Also you need Apple's permission to use a certain carrier. They may call it compatibility, but it's still permission.You don't have to deal with CS in order to switch eSIMs around between devices. The idea is that you can manage eSIM profiles on the device itself. If anything, eSIMs make switching carriers easier because you don't have to physically visit a store to get a SIM card (or wait for it to be delivered in the mail!).
What do you mean by “updated in early 2021 to better take advantage of T-Mobile US’ 5G network”? I have a T-Mobile SIM card in my 12 Pro that I’ve been using since 2015 beginning with my 6s. Do I need to upgrade the card to a newer one to get 5G speeds or did you mean something else?This is why my iPhone 12 still uses a physical nano SIM card, which of course had to be updated in early 2021 to better take advantage of T-Mobile US' 5G network.
I’m on AT&T and I can download a new esim from my account page with AT&T. No need to call anyone.So, that will convert a physical SIM to eSIM. But if you want to have a new eSIM provisioned after that, you have to call.
As restrictive as AT&T's eSIM provisioning options are, oddly that "convert to eSIM" option has never been offered on any Verizon or T-Mobile SIM I've seen. I suspect only AT&T supports it. Though I do wish Apple would work with the other carriers to expand it so that going to physical SIM to eSIM was more seamless.
I was sent an email from T-Mobile US that iPhone 12 users need to update to the latest physical SIM in early 2021.What do you mean by “updated in early 2021 to better take advantage of T-Mobile US’ 5G network”? I have a T-Mobile SIM card in my 12 Pro that I’ve been using since 2015 beginning with my 6s. Do I need to upgrade the card to a newer one to get 5G speeds or did you mean something else?
I had the same problem. Switched 3 phones with physical SIM from AT&T to T-Mobile. One phone had problem day of SIM swap. Second phone 2 weeks later. The third phone, no problems…yet. The solution that worked for each phone was logging out of iCloud. Shutting off phone. Log back into iCloud.Earlier this week received a message that iMessage had been deactivated due to an error (iPhone 12 Pro, T-Mobile, but a physical SIM). After two tries, though, was abler to re-enable it.
Which still more or less proves my point. With physical SIM, all I need is a paperclip to switch phones or carriers. eSIM is a PITAWith AT&T you still do. But Verizon lets you do it on their website (albeit from a PC/Mac, not on mobile). I believe T-Mobile even does it from right within their app.
We need e-sim in the ecosystem. Otherwise, the Apple Watch would never be able to connect to the Cell Network regardless of who your service provider is.