Article: Skype is available for free for iOS, Android, and Windows Phone.   Click here for instructions on installing iOS apps.  Click here for instructions on installing Android apps.  Click here for instructions on installing Windows Phone apps. If you already have a Microsoft account from Windows, Office, or your Xbox, you can use it to log in.  If you are using your Microsoft account to log into Skype for the first time, you'll be asked to create a Skype username that will be displayed to people who aren't on your contacts list. You'll need to have an active wireless or cellular data connection in order to log into and use Skype. If you don't have an account, tap the "Create account" button and follow the prompts to create an account. Creating an account is free and doesn't require any payment information. After signing in, you'll be prompted to scan your device's contacts for people to add to Skype. You can skip this step by tapping the "X".

What is a summary?
Download the Skype app from your device's App Store. Log in with your Skype Name or Microsoft account. Create an account if you don't have one. Add contacts from your device (optional).