I know a way to verify unlimited Instagram accounts with real US phone numbers for free. However I don't know if I should post it because I fear Instagram might close this loop hole once enough people start taking advantage of it. I used to bot around 300 Instagram accounts but it became very hard managing them so I stopped. I don't really use this method anymore so I was thinking about revealing. If enough people tell me to reveal it I will. I live in the US and it works here. So I can't guarantee it will work in other countries.