Haswell Dell XPS 13 wifi problems.

Hello everyone.

I bought a 9333 XPS 13 in December, i love the laptop, but i've experienced some internet signal and speed problems. After reading a lot on the internet i found out that the AC7260 card has a long history of problems, so i decided top update the wireless card driver on Intel website, but the problem only got worse, so after trying it 4 times and reseting my computer 4 times i found out that Dell itself released an update in the beginning of January, I updated the driver and thing got much better, signal is stronger, but is not really consistent, and i still can't get 100% of my internet speed, 60-70% is what i normally get, even my phone downloads and loads YouTube videos faster.
So now i'm starting to look after another option, I'm getting tired of not being able to see and entire 2 minute 720p video on YouTube without having it stopped. Unfortunately i can't return the computer because i bought it in Canada and i live in Brazil, so i was wondering if someone had this problem before and fixed it, or if i can just put a different wireless card on my computer.

Thanks for you attention.

 

Funny cause my 9333 has issues of not realizing full download upload speed on home router. Thought it was wifi ac backward compatibility issue or drivers.

 

Sometimes I lost my connection both 2.5 or 5Ghz. I have the intel chipset and 5600U.
It is unacceptable that I can't install latest intel drivers!