There's a lot of questions concerning the back button with mobile navigation; however, I haven't seen something along these lines.

If full navigation is provided as an option on interior pages, should there be a "back" button among its options?

Example Scenario: A mobile website has 4 child pages, all accessible via navigation on the home page:

• Login
• Contact Us
• Store Locator
• Jelly-Of-The-Month

Inside any of these 4 inner pages, a navigation bar is provided that has links to each of the 4 inner pages as well as the logo which returns the user to the homepage. The navigation bar is consist across all inner pages.

In this scenario, should the navigation bar also include a "back" button as the first/left element even though full navigation is always available?

If full navigation is provided for every page of a simple site, should there be a back button among its options?

Example Scenario: A mobile website has 4 child pages, all accessible via navigation on the home page:

• Login
• Contact Us
• Store Locator
• Jelly-Of-The-Month

Inside any of these 4 inner pages, a navigation bar is provided that has links to each of the 4 inner pages as well as the logo which returns the user to the homepage. The navigation bar is consist across all inner pages.

In this scenario, should the navigation bar also include a "back" button as the first/left element even though full navigation is always available?