Hi guys. Hoping yall can help me out. I recently got this on clearance at T-Mobile. It came with 5.0.3 out of the box. I immediately downloaded 6.0 from SamMobile and I installed the upgrade this way.

The phone boots and runs but it is EXTREMELY laggy.

There are things I could do. I could root it and put a custom ROM in there and I assume it will fly. But... As I have a brand new device, i want to make sure that I have a warranty in case there is something wrong with the guts of the device, I don't want to have to send it to Samsung for them to tell me I have no warranty.

So any method that requires root is out of the question. What are my options? Because even if I Odin back to stock, knox would still be tripped thus voiding the warranty.

I have tried booting into recovery and clearing cache. This was no help. Is there anything I can do, or is this an issue with all S6 edges? Is this an issue with dropping snapdragon to only use their processors?