Have bought the Kindle Fire HD, as I want to travel with as little ballast. The pre-installed Skype version for Kindle does not offer all possibilities as the full version. To make calls, it is enough if you previously updatet its phone book on the home PC and then retrieves on the Kindle. The editing of entries is only limited possible. When you synchronize data with the address book, so it comes in address to duplicate entries, which can no longer be deleted, but can only make invisible. Thus blocking the Skype address book. The Kindle's Guide gives no guidance. Well, it would be first to update the Skype account / install and then to complete the address.
Skype is fun and you stay in touch, but the stripped-Kindle Tablet Edition so has its pitfalls and drawbacks.