What people are talking about with this method is similar to mine. What we are doing is using an android phone to log in to the Instagram app, request the phone verification code, receive it on that phone, then input the code into the Instagram app - which verifies that account safely.
Then we clear all details of the phone - from IMEI, IP, device details, User ID, and can repeat the process on another account. With this method, IG records the details of the device, IP e.t.c each time you log in to the app. So IF you want to use a safer method, it involves more work and you do need a rooted android phone at the least. So the cheap alcatel or similar phones won't work for that purpose.
If you are just using a standard alcatel or any other phone to just receive texts and not log in to the IG app, then you will be fine.
Personally, I go the whole hog and use a rooted android phone and another phone is involved too. Anyone making a purchase will be sent the full guide on how to do this, so far this specific method working perfectly with no bans