Can someone call me on Skype without adding them?

Yes, with a Skype Number, people can call you from a landline or mobile, and you can pick up the call on Skype. Its great if you have friends, family or colleagues who dont use Skype, as they can simply dial your Skype Number to get in touch with you.

Is Skype video call safe and secure?

All Skype-to-Skype voice, video, file transfers and instant messages are encrypted. This protects you from potential eavesdropping by malicious users. If you make a call from Skype to mobile and landline phones, the part of your call that takes place over the PSTN (the ordinary phone network) is not encrypted.