Lily 2 pair problem

hi

I have problem wiht lily2 I make more ot the thing see around like disable bluetooth restart app on phone but still have same result when I try to add watch on the app.

The app find watch but dont appare the code of pair on the watch and no screen on phone to see code.

I try to reset default the watch and uninstall app on phone but nothing.

I try connect with the cable with pc and after same try watch connect sync with pc but cant connect with the app on phone.

Atm firmware 7.10, if I make default reset watch stuck on screen with qrcode to make a pair no more. 

In a previus time after more time was connected on usb cable the watch came up with other menu function.

On the phone all bluetooth info of watch are deleted.

Sameone can help?