For the accounts with non-pva we bought , when we tried to log in it, it required the phone verification. After we type one phone number and get verified, would we be required for the verification again in future? or just first time to verify it?
You will get repva for sure, those pvas are cancer for me.Everyday i have to repva ~20accs.
Depends on how you’re using the accounts, but most probably you’ll need to do it many times more 
From what I noticed happens mostly with small accounts, once you go over 40k or so PVs are more rare.
ok, note that, thanks.