Help please **this device has been modified in an unauthorised way**

[Brooks17]

I bought my phone off Kijiji a few months ago. I have a galaxy note 5 and when I try and see if I can download a software update it gives the following message this device has been modified in an unauthorised way.

I downloaded root checker and it says that the root was not properly installed. So I'm assuming it's not rooted if it's saying that?? I don't want too root my phone or do anything that will mess it up.

I'm running Android 6.0 and it says my device is custon.

Can someone please tell how I can fix this.

 

[mhinc]

I bought my phone off Kijiji a few months ago. I have a galaxy note 5 and when I try and see if I can download a software update it gives the following message this device has been modified in an unauthorised way.

I downloaded root checker and it says that the root was not properly installed. So I'm assuming it's not rooted if it's saying that?? I don't want too root my phone or do anything that will mess it up.

I'm running Android 6.0 and it says my device is custon.

Can someone please tell how I can fix this.

It does sound rooted. Just as the software says, in an incorrect way.

 

[Brooks17]

So how do I fix this problem?