Fyi, was playing around with this red bull mobile esim
They have a free 100MB (expires after 365days) once you sign up in app (and also referral codes if you want to use mine, only useful you were to buy data: RCv1zz27cxmX4IfI
https://esim.redbullmobile.com/
It allowed me to connect to Verizon, I was able to use data after manually configuring APN to webapn.at. LTE only , no 5G. Able to force band13 (used by Verizon only), but it could also use band66 and other
Was able to connect t T-Mobile/att
first time I've seen Verizon supported, exit IP was in Vienna, "A1 Telekom Austria AG", so going thru it's parent company (not white label MVNO) and it seems like A1 Telekom has roaming agreement with Verizon?
Supposedly even 5G too (it's just R15 indicator, i don't see it actually connecting to 5G NSA though. The esim slot on phone doesn't support SA 5G