Well, there cannot be any specific answer for that, however, we do advise that you go for this option when two conditions are present. First, you have a bad credit score in general.
Second, you do not want to keep the device for longer than four years and are looking for flexibility in choices and options. In these situations, leasing is a very good option.
On the other hand, if you want to own for more than 2 years and retain the ownership after the payment, you can go for financing the phone too. Either way, bad credit is always the situation where people look towards rent to own phones.