Skype help - Important questions

Question

I have many many questions to ask.

1) Do you have to buy an online number? Is it a must?

2) Skype to skype on computer is free right? even if it is abroad, am i right? Does this mean the other person will have to buy an online number too?

3) Why do they charge £10 to buy a number. What if you dont want to buy one? What then? How does skype work without buying personal number?

4) I want to call from skype (computer) to a mobile number in Europe. How much will it cost me?

5) Is Skype meant to be cheap?

6) Is it silly buying the Unlimited Europe deal (£2.95/mnth) coz is it only for landlines? I want to call mobile. Can it not work for that?

http://www.skype.com/intl/en-gb/allfeatures/subscriptions/europe/

7) is rebtel more worth it?

http://www.rebtel.com/en/How-it-works/How-to-make-a-smart-call/

Answer 1

 When i am on  skype, i am unable  hear the caller when using a tmobile dongal. How can i improve the sound quality?