Kindle can be more conveniently used with some phones, and thus, it is also not hard to learn how to sign up for kindle unlimited on phone.
Sign in: Select and download the Amazon Shopping app on your iOS or Android device and sign in.
Open menu: Press the menu button which is commonly three horizontal lines and can be found in the lower or upper left-hand corner of the display.
Select Kindle Unlimited: Continue scrolling down the menu until you find Kindle Unlimited and press it. You can also search the app by typing in Kindle Unlimited.
Start the Trial: Just like on the desktop, there will be a button to press on the page that will open the 30-Day Free Trial.
Confirm and Complete: Check the information, make sure that you choose the most appropriate payment method and tap to confirm. You are subscribed and can now download the Kindle free app to begin reading. This completes how to sign up for kindle unlimited on amazon app, letting you start reading or listening immediately.