What is the process for porting a US number to Tello while living in Thailand?

I ported my T Mobile number. Took about 10 minutes. Instructions are clear.

I did it in the states before I left to come to Thailand in January of this year, when I had ATT, and now am with Tello on a $6/month plan that gives me unlimited text & 100 talk minutes. I haven’t barely used it because I use WhatsApp but didn’t want to permanently give up my long-time mobile phone number. It was a pain in the ass to do it even with the directions Tello gave me. I ended up having to have them on the phone to walk me thru the steps and ATT was not easy to deal with in the process. Your phone must be paid off and unlocked in order to do this. I also now have a Thailand phone number so usually work with that. Hope this helps.

I need to figure out how to port one of my Google Voice numbers over because it is just becoming more and more of an issue with banks everyone's blocking this number nowadays. Is there any carrier that allows this while not on us soil

I ported my number from ATT to an eSIM a month before moving to Thailand. Been in BKK for a year. I’m on the $5/mo plan and use it for OTPs. I also have Google voice to make calls over WiFi.

I ported from Verizon to Tello. Straightforward and no regrets.

I use Yolla super simple to use