How to upgrade Samsung Galaxy Grand Prime G531F from 5.1.1 to Marshmallow 6.0

[Raivis]

Hello!
I need help please HOW TO!
I tried all methods but all of them failed especially all youtube videos related with this phone.

I did even root my phone and root check says its rooted but when I boot into recovery mode then select from SD card particular zip file it says failed to verify whole-file signature.

Please some smarter people write one and forever proper instructions for
How to upgrade Samsung Galaxy Grand Prime G531F from 5.1.1 to Marshmallow 6.0.
Or please write down how to remove that silly failed to verify whole-file signature.

Kind Regards!

 

[Jfalls63]

Looks like 5.1.1 is the last stock version released. Are you trying to install a custom rom?
Do you have a custom recovery?

 

[Dannydet]

As mentioned by Jfalls63, unless there's a custom rom out there, your stuck at 5.1.1.....