Using Skype from canary islands?

I'm travelling to Tenerife and would like to use Skype through my iPhone to call the uk.
I have a monthly contract with the 3 network and use Skype regularly within the uk so no problem there.
What imy cheapest option to call the uk via Skype from Tenerife? I'm not worried if I have to use a different network if that's my best option.

All you need is wireless internet and a passport and you're set. Lots of places in tourist areas like Tenerife provide wireless internet, but it might not be secure.

All you will need is a Wi-Fi connection. If you are stuck for one try macdonalds

All you need is a Wi-Fi connection and a Skype credit in case you wanna call from Skype to a mobile device. 0.20 Euros per minute from any location, to any location. In case you wanna call from Skype to Skype, then just a Wi-Fi connection will be enough. I believe every single cafeteria, hotel, store, restaurant in Tenerife has a Wi-Fi connection. Just ask them for the password and you're all set.

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