Credit: Kris Carlon / Android Authority
A new feature called Network Pass gets new customers unlimited free T-Mobile service for three months.
This used to be known as Test Drive, which limited you to 30 days or 30GB of data, whichever came first.
Network Pass is available to any unlocked Android or iOS phone that supports eSIM.

One of the magical promises of eSIM technology is the ability to switch to a new carrier without needing to go to a store or even wait for a physical SIM to arrive in the mail. Instead, you just use the electronic SIM card installed in your phone and switch around from carrier to carrier at will.

T-Mobile is now letting us experience some of that reality. The company is rolling out a new feature called Network Pass that, unbelievably, gives you free T-Mobile service for three months. That’s unlimited service, too, with no data caps outside of the usual 50GB throttling limit.