mobile

So guys, I've just bought a nexus 6 last week, and I'm experiencing some strange issues with the WiFi.

Loading content is really slow, things like loading app list on google play, new videos from my subscriptions on YouTube or even a search on google using chrome can take minutes (not exaggerating here, on stopwatch to load the information and pictures of an app on play store the phone took more than 2 minutes).

And some notifications they don't come right away, (new emails, WhatsApp,etc...)

Although the internet where I live now is not the best and the modem/router is a single channel fritzbox, it's fast enough for a simple WhatsApp message to come through.

What I ruled out is:

Provider blocking ports used by google services < contacted the support and no ports are blocked, and things work fine with my mate 7 running kit Kat

Provider slowing down access to google < nope, it's illegal here and again my mate 7 works fine

Interference by other WiFi networks < I'm in a WiFi crowded place now, but my router is the only one on channel 13, tried other channels and no luck either, and again all other WiFi devices work fine here.

My nexus 9 shows the same symptom but not always.. So I assume it's a lollipop thing... Someome has some tips of things that I should try? Thanks a lot