Hi, I think its not a big deal my dear friend. I guess you might be facing some compatibility issues.
To download Skype in your smartphone, just follow these simple steps:
1) If you're using Android smartphone, go to google playstore and search for Skype.
2) Tap on the install button and let it install into your phone.
3) After installing the app, open it and accept the terms and conditions, register on the app if required and that's it.
If the problem still persists, try to contact the Skype support team or make sure your device ticks all the boxes required to run the app into your phone. Good luck!
