I think this question was asked many times before so my apologies for bringing it up again. But I’ve spent 2 days without finding the solution.
I could not change the structure of my website so I used the css trick taught on Full Browser Width Bars to have full width images on my website. But when I checked my website on my phone (iPhone 6), I realized that there is a huge horizontal scrollbar. I tried every solution discussed but couldn’t get it work.