LG G3 Cat.6 — LG G3 factory reset stuck in "Checking info..."

After a factory reset of my LG G3, it comes up with "Android is updating" and after optimising 30 apps it goes to an LG welcome screen, where you can select a language and go to the next screen which allows you to enter a network. The next screen allows you to copy Google accounts from another phone and if you skip this step it goes into a Blue and white screen saying "Checking info..." and there it sits for hours and perhaps forever.

I was on the point of rooting the phone, when I tried it again and this time it came up with the message "hang on a sec" and after a while it said it could not contact a Google server, but it went on and allowed me to set up the phone. But I still have the problem when I want to add a Google account and that means I can't use Play Store or the Gmail App
I do have a Google account and I can even access it from a browser on the phone, but not from the Gmail app.

I don't want to download the Gmail App; I've got it. The problem is that I can't USE it.