'Bann' or disable can't create IG is have 2 factor, on Device and IP, which is mean, altought using phone number, if you just did it for single IP, for continuously, will detect and no longer able create IG
I have experience create more than 400 IG account, what i did is
- using phone number each acc 1 No (before i able to create IG using FB sync but now is hard to make it)
- access interent using Mobile Phone (3G/4G). Using resedential IP is Ok too (or your local IP) but with make time do reset/change IP each perioude count made account
- using minimal User agent on your Browser (minimal mean mobile user agent) or made simple ways just use your Smartphone to create IG account