Hello all. I just registered to this forum in hope to solve my problem with your guys helps. I tried many things and many forums to fix my phone's problem but no avail. I'm sure people did their best to help me and I would really appreciate if you could your best too. I have the Galaxy S5. I was very content with it, minor issues most of the time. Until I update it to the latest firmware (for solving call issues). I don't know what just happened but my phone is suddenly turned to be physically very slippery. There was no slippery whatsoever before the update. I think it is causing because of overheating but I am not sure. I don't feel so much overheating. Slippery is much bigger problem than overheating. I fear to drop my phone someday, it is THAT slippery. The steps I've done so far: Resetting system to factory settings, In recovery menu, wipe cache and data, Flash the whole stock rom for my country via Odin, Flash many stock roms; KitKat, Lollipop, Marshmallow, other countries' stock roms, Flash with the following options ticked in Odin: Re-Partition PIT, Nand-Erase All, Bootloader Update, Void warranty and root and flash custom recovery Philz, there format anything can be formatted, Install custom roms, Change kernels, Use phone cases, Change the charger, Change the battery, And nothing helped... Now I'm seriously thinking to sell my phone. What should I do guys? I'm hesitating for RMA because the Knox counter is already tripped and if they find that out, I don't know what will happen. Please help me.