Unfortunately, I had to quit using Beeper a few days ago. Ever since they migrated to their new hungryserv, iMessage reliability has gotten steadily worse and worse. It culminated in an entire day of sending iMessages where Beeper gave them all a delivered checkmark... But none of them actually reached their recipients. Was fun explaining to people who were angry I hadn't messaged them back in over a day... I'm back on BlueBubbles now, hopefully it will be more reliable. Overall it's a shame because I'm really rooting for Beeper to succeed. I'm sick of all the existing chat providers.
I have it running on my mac so I can iMessage from my Vivo X Fold (and Windows laptop) and my iPhone that sits at home shares the same number using T-Mobile digits.
This setup still lets me use my Apple Watch Ultra to receive all the same notifications over cellular.
A fun overly complicated adventure since the iPhone has been boring for years, but I really like the Apple Watch on cellular for running, skiing & Scuba Diving plus everyone I know is using iMessage...