What is the exact message?
Lots of banking apps won't load on rooted phones. Is the phone rooted?
I wouldn't be inclined to trust a Chinese phone direct from the factory, let alone something supplied by a third party, let alone a refurbished one.
Yes, it is rooted. Banking apps shows it is rooted. What does exactly rooted phone means? Isn't it secured?
This is also a reason why some mobile app doesnt load where it might be a rooted one, When we do talk about rooted phones It gives you privileges to modify the software code on the device or simply means you unlock it beyond manufacturer default settings. You can actually unroot your phone but if you are not expert on that thing then better not to do it because you would really just brick your phone.