I am using Public Mobile on my dual-sim capable device. Im using a Google Pixel 3a XL and have the Public Mobile sim and a Fido eSIM. It works OK for my needs!
@efp for the most part I think it is true that you can use any 2 Sims in a dual SIM phone. Although in January I went to Mexico and bought a sim card off of Amazon. In the instructions it said that it had to be used in sim slot one of my 2 slot phone and you could put nothing in slot 2. I tried it in slot 2 and it worked for talk and text but it wouldn't give me a data connection.
