While the Spring/T-Mobile merger is on everyone's mind, this is not about that…at least not directly. Rather this is about using the current Spring and T-Mobile networks as needed to get the best performance for my single device. eSIM support would provide me with the ability to switch between the Spring and T-Mobile networks as I needed to for performance. For example, Sprint has areas around me that give better data performance than T-Mobile. So I would typically be on that network. However, there are places where I go where Sprint offers zero coverage and Ting moves me to the Verizon network for voice and ancient SMS texting–reducing my smartphone to basically a flip phone.
eSIM support would provide me with the ability–I think–to switch from Sprint to T-Mobile when I get outside of the Sprint coverage. Now, I'm sure that Verizon wouldn't like that, but I really don't care. What I do care about is that I get a better experience on Ting.