have you set up the routers security,if you have not somebody might be using your bandwidth. if you have, try resetting the router to a differant number, ie say 7 instead of 9 and see if that is any better, you could be on the same as a nieghbour.
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?