Skype is for doing things together, whenever you’re apart. Skype’s text, voice and video make it simple to share experiences with the people that matter to you, wherever they are. 
Below are some steps on how to use Skype on your iPhone.

Step 1
First lunch the Skype app on your iPhone

Step 2
Now you need to sign in, all you need to do is to type in your Skype name and password

Step 3
Then click on the name of any contact you want to reach.

Step 4
Finally you can now  click on your buttons on the contact to perform either video call, SMS, voice call etc.

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