Rent 4 Keeps is being sued by ASIC over avoiding protections for the vulnerable. But beware of rent to buy in general.
Also watch out for OpenPay, I almost signed up to cover my cat's vet bills but was thankfully able to manage.
I haven't personally used No Interest Loans from Good Shepherd so I can't speak to how safe and legit they are, but if you're in some unavoidable difficulty they don't charge interest and on the face of it do seem a bit less predatory.
https://news.nab.com.au/news/nab-and-good-shepherd-20-years/
I've always felt that this business model, which primarily targets people on payments, is incredibly predatory.
I wish people knew how to find great $300-$400 phones, I got a Poco F3 for $400 1.5 years ago with a SD870 8GB/256GB.