Hi.I bought used samsung phone .And I noticed it's os is custom .When I start up hone ,it shows triangle and warns keep your sensitive data away from phone. I attempt to update my phone but it says phone's os reinstalled unauthorized way . I cant reinstall stock os. I tried several times , but it keeps status same . Is there any way to do it?
As @keith30 has rightly said, send it back and get a refund.
If the OS isn't genuine, you'll be risking all sorts of future problems in terms of software, updates etc AND perhaps more importantly who knows who can access your data on this thing?
