[Galaxy Note 3 Q&A, Help & Troubleshooting] Kiiochii:
I think they got my phone worse, I'm planning on take it back to Samsung but first I want the opinion of you guys since I've learned so much in XDA and they are so much "pros" in here.

I would like to know if there is something I can do? Is there something I should say to them? and mostly ... Should I ask for a full refund for the new $330 main board that DID NOT fixed the problem or they did well?

The beginning :

- I bought a N900W8 in september 2013, since the very beginning it had a multitouch problem, when XY from a finger aligned with the XY from another finger, one of them would disappear, it wasn't such a problem for me since the odds to trigger the bug wasn't that much and I had warranty.

- Kitkat was out and I couldn't help myself and updated it to the mexican leak, since it was "Knox-trigger free" and "downgreadable" I was still planning to take it to warranty if the problem with the touchscreen persists.

- Everything was fine and it didn't had the problem anymore, kitkat was amazing, rooted it, installed X-Note, my phone was great. Months passed, I updated it with the canadian Kitkat NB7 and more months passed.

- So, it's september 2014, I was reading reddit on my phone and it started to lag bad, like unusable bad.

Diagnostic :

- Later I notice it's not lag, it's a delay with the touchscreen. If I used any voice assistant app It would work perfectly but if I touched anything on any spot, it would take like 30 sec to recognize or it would act like I was long pressing it or double tapping, same thing with the pen and the physical buttons (volume, home, power). I spend nearly 20min tapping everywhere on TWRP recovery mode and there was no delay, the physical buttons worked perfectly too. EDIT: every time I installed or re-installed a ROM every tap/physical worked perfectly when selecting (next, next, choose apps, etc). the delays started after booting the OS.

What I did :

- Clean up the phone, check RAM (max was 10% still had 15~45sec delay), Format, Hard Reset, Reinstalled Kernel, Reinstalled ROM, Downgrade ROM, tried another Kernel, another ROM, 3 more ROMs, 2 more Kernels, flashed everything stock, tried stock with custom kernel.. NOTHING. The only thing I couldn't do was to flash Jellybean back because I updated to NB7.

- Took it directly to Samsung (Knox was still 0x0 but there is NO 4.4 update in my country yet so warranty wouldn't cover it) the guy said it was too weird, I took care of my phone so much, he though I bought it 1 week ago not 1 year lol.

What SAMSUNG did :

- After a week they told me it was the main board / motherboard, charged almost $330 for a new one.

- Went to pick it up, the guy turn it on and handle it to me, I even couldn't choose the language because the delay was there. He immediately called someone on the phone, and told me he has to take a video when the problem occurs, but when he inserted the battery back my phone started to work perfectly, almost 45min later was still good so he told me to go back if something happens again. My Scover didn't work, they told me it's "normal" for the Scovers to broke (it did worked before taking it to repair).

- 3 days later I decided to install 4.4 again, but this time I was not going to update it so I could downgrade to 4.3, long story short, I flashed 15 times and downgrade it 16 times because everytime I was on Kitkat the incredibly annoying delay cames back and it fixes when I flash JB back.

New problems :

- The problem persists on kitkat dissapears on jellybean, I haven't tried the updated firmwares, just the leaked mexican one since I needed to downgrade android.

- Scover makes my phone flashes like I'm open it and closing it.

- Every re-boot the half botton of the screen and the volume/home buttons, back and menu, won't work, the power button shows a black screen with the options on the top. I have to pull the battery or shutdown- turn it on in order to solve the problem.

Thank you for reading :)!