If you are looking for a way to access the desktop version of a website on iPhone, it is likely that a particular feature that you want to use is only available on the desktop version of the website.
This is a fairly common situation on mobile devices, due to the practice of websites like Amazon, Facebook and others offering lesser features on mobile devices, compared to their desktop versions.
The reason behind this strategy is to make websites load faster on mobile devices, which are usually connected to slower mobile networks and have limited processing power.
Request Desktop Website on iPhone
If you find the need to access the desktop version of any website, you can make use of “Request Desktop Site” option as available in the default Safari browser on your iPhone.
Once, you are done using the Desktop version of the website, you can easily switch back to the mobile version by using “Request Mobile Website” option that becomes available on the Safari browser.
1. Request Desktop Website on iPhone Safari Browser
You can follow the steps below to access the Desktop version of any website, using the default Safari browser on your iPhone or iPad.
1. Open the Safari browser on your iPhone.
2. Visit the website that you want to access in desktop version (say Facebook, Google Images, etc.)
3. Once you are on the website, tap on the AA icon in the URL and select Request Desktop Website option in the drop-down menu.

This will immediately take you to the desktop version of the website.
2. Switch Back to Mobile Website on iPhone Safari Browser
At any time, you can switch back to mobile version by tapping on the AA Icon and selecting Request Mobile Version option in the drop-down menu.
Once you are done using the Desktop version of website, tap on the AA icon in the URL and select Request Mobile Website option in the drop-down menu.

Now, when you reload or refresh the browser, it should load the mobile version of the website.