Hi!
If Playstore is saying the device is rooted then it's very likely it has a firmware that it was not meant for the area the phone was created for, some people sell "Global" versions that are just rooted CN devices with a WW firmware and they are voided of any warranty and support, it also messes with many apps that need a security check.
I could make a check if you send me a PM with your Serial Number and IMEI number, just make sure it's a PM and not a post here.
