Safari is not the only browser option in the iPhone. You can change your default web browser to Chrome, Firefox or any other of your choice. Download the browser you want as the default one, then go to the browser app on your iPhone. Go to Settings, tap Default browser and then tap Open Chrome settings (if Google Chrome is what you want) and set it as the default browser.
Source: https://www.gadgetsnow.com/slideshows/13-hidden-iphone-hacks-you-should-know/photolist/88095376.cms
