Starting with the first Pixel in 2016 and continuing with the Pixel 3 series a year ago, Google's smartphones have been sold exclusively on Verizon (and Google Fi if you want to count that) in the United States.
The news first popped up from both 9to5Google, whose sources believe that T-Mobile is preparing to sell the Pixel 3 and Pixel 3 XL. The Google Pixel 3a and 3a XL, the firm's low-end variants of the flagship Pixel phones have had their Canadian pricing leaked.
In addition to Verizon, the Pixel 3 and Pixel 3 XL have been available direct from Google, so T-Mo customers interested in those phones haven't had an issue buying them.
We've been hearing for months now that Google is working on a more affordable version of the Pixel 3 and 3XL in the Pixel 3a.
In other Google Pixel and T-Mobile news, today's report also mentions that T-Mobile is testing the Google Pixel 3a for network compatibility. Of course, the unlocked Pixel phones have always worked just fine on T-Mobile, but Verizon was the only carrier selling the phone directly. For now, we'll have to be satisfied with the knowledge that a deal between Google and T-Mobile may be in the works. We have nothing concrete on the Pixel 4-T-Mobile could offer the phone immediately or perhaps it will be another (allegedly) delayed release like the Pixel 3.