I learnt the hard way that you shouldnt be buying these insta accounts. Endless phone verifications and you have to tiptoe over everything. I use sim cards to verify my accounts. I realised that accounts I created myself seldom have phone verification unless you did something drastic. It's not worth the headache, trying to buy accounts that are legit. You dont know what IP they use and what method they use etc.
Instead, download an emulator and create accounts manually. Or head to cyber cafes and create accounts at their computers. Use your friends phones, family phones etc. Any phone you can get ur hands on just spend 5 minutes and create a few accounts. You can log in from mass planner after and not use the device again. Thats what I did.
U can probably create about 3 accounts safely per device and IP. Now I have about 70 ish targeting 100 accounts. About 25% of them are bought accounts and they are giving me so much headache. I spend so much more time on them constantly checking and verifying. Really regret it.
And also make sure u keep excel sheet in full detail (email, date created, login, passwords, ip address, device created on, niche, notes, etc etc). Make sure to structure everything properly early on. This is golden advice.
Or you end up doing the hard way like me. It may seem pointless now but trust me, when you scale up (and you definitely will when you see money rolling in), you will have a headache. Now I have everything structured proper and doing things much easier. Time is money guys. Don't waste time on stupid sheeeet.