Been meaning to check them out. Not sure how their burner numbers work / if they have a VOIP app.
Discussion
Been using them for about a month. Works fine so far. Cheap anon numbersandd data.
Proovl has worked well for me at least: https://www.proovl.com/
Maybe nostr:npub1vr2nva0s0hhfulthjy8053rg9kruk5erzwaxdw85gjwkfytj994sgudzvx can answer your question.
