Android pay won't allow me to add cards on previously rooted phone

[AC Question]

I've got a Samsung Galaxy Note 2 currently running stock 4.4.2 and I'd like to try our Android Pay but the app won't allow me to add a card as it says the android version is not correct.

The previous owner was using the phone rooted and said he had unrooted it before selling it. However it doesn't appear to have been correctly unrooted.

I certainly don't have root access but the Knox counter has been tripped and there are apps like SuperSu showing in the app folder but won't run as the binaries aren't there and also won't uninstall.

My question is: is it possible to unroot to allow android pay to run on this phone or will android pay never work on this hardware now? If it can be done, do I need to re-root the phone and unroot it again and do I need to try to reset the Knox counter (if that's possible)?

Thanks in advance for help and advice.

 

[anon(632115)]

You can flash it with stock firmware for your device using Odin which should resolve the problem. Use the exact FW for your device and backup first. Once Knox is tripped, it can't be reset but that shouldn't be an issue

 

[Paltibine]

I'm 99% certain that is what has already been done - in that is what I was told the previous owner did and all the version numbers etc are correct for latest official release for that hardware.

It has lost root but seems to have left some stuff behind that android pay can detect.

 

[anon(632115)]

If SuperSU is still present I doubt it was reflashed

 

[Paltibine]

OK - for a first attempt I'll just try using Odin to reflash stock firmware without doing anything else and will confirm if that fixes it.

Thanks for your time.....

 

[anon(632115)]

Fingers crossed

 

[Paltibine]

Well I've now reflashed the stock firmware with Odin. I flashed a different carrier version but otherwise the same.

Anyway android pay now allows me to add cards so that part has worked!

But SuperSu is still showing as an app (still doesn't work and won't uninstall) so that is just the same as before.

So thanks for the help. Android pay is now working!