For sms number used to receive code autentication i ve use this comp. Few usd/month.
They offer some numbers in dif countries. Sms code can be routed to your email in few seconds…
Be aware that this Does not work with ALL countries or all numbers + support is slow but …they could make it work for me after various chats…now it works steadly.
I never use it for voice call or to reroute call though.