If you are using the OS X operating system on an Apple computer, then you may download a free Xcode app. How to Debug on iPhone Safari? IOS Simulator Thankfully, there are a multitude of tools, emulators and other solutions available to help you test and diagnose mobile issues, which we'll be looking at in this post. With multiple devices, operating and browsers available, there will be times when a particular site issue only affects the mobile site or particular mobile browsers this can be a problem if you don't have a test device handy if an issue is only being experienced by iPhone users in the Safari browser, then if you don't have that particular device to hand it can make troubleshooting a challenge.