So it does seem that most of the benefits are because of the 2nd line/imei not necessarily the esim.
I think that for many of us in the United States, who do not travel much internationally, the answer is yes. The two lines probably mean more to us than the ease of an eSIM.
However, if you move to a different part of the country or visit Canada or something, then I can see that the eSIM's ease of installation would be quite a boon for adding a temporary cellular plan.
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But right now don't you have to go through a lengthy call/chat with the carrier to boom get it?
The four major providers have handled it in different ways.
Sprint is pretending the eSIM does not exist, and the same with Xfinity Mobile.
AT&T wants you to get a physical piece of something from them with a QR code on it.
Verizon's iOS application allows an easy installation of a postpaid plan, but not a traveller's prepaid plan.
T-Mobile has an application that allows an easy installation of a prepaid plan, but the application does not allow for postpaid, normal, everyday cellular plans that most of us would be using. They're thinking about the viability of allowing postpaid plans, but they haven't done it, yet.
Some support personnel at T-Mobile mention problems, but I cannot imagine what they would be. My T-Mobile primary cellular plan has been on an eSIM ever since I learned how to do it, and it has been just fine. No problems at all.
The comments about problems with conversations with support personnel refers to the fact that since we've started doing this and everybody's caught on to it, the support personnel will ask you if it's for an eSIM when you call to say you want a SIM swap. That's what's stopping people cold...they just can't bring themselves to lie to the support person.
T-Mobile is very service oriented, and I can't imagine that they'd keep us from doing this forever. I don't know what the problems would be that are stopping them from adding the functionality, but there must be something.