Instagram doesn’t say publicly that it differentiates iphone and android sign‑ups, it says the most important things are stuff like how old your account is, whether you confirmed your email or phone number and if you behave like a real person. That said, many marketers have observed anecdotally that iphone‑made accounts sometimes “warm up” a little faster, simply because it’s more difficult for mass‑automation tools to emulate ios devices than to globally adapt themselves to android devices. But keep in mind that this isn’t a formal instagram rule.