I've had my cellphone number for over 30 years and I would like to keep it once I move to Thailand. Can anyone tell me how I can maintain this number, without incurring ridiculous charges from my phone company here in the U.S.? Thanks in advance

I am looking at porting my US number over to Tello. Anyone have any experience with this?

Something I found that allows US travelers to keep their current number and use it for travel check details for more info

Not promoting just something I found and wanted to share to other travelers and a resource

A question about telephones. We have US cellphones, but we're moving to Bangkok in November. Ditching the US phones (but we can keep the number, according to Consumer Cellular), and we will buy a new phone in Thailand. I'm worried about a few US corporations that like to 2-Factor authenticate on a US phone number, has anyone 1. used Google Voice, and 2. can it be used for 2-Factor authentication?