Data Roaming in Greece
Mobile Broadband without contract | WIND
Scroll down the page, 3GB for £12.58 inc VAT lasts a month.
Pick one up from any Wind Shop there is at least one on any island even the tiniest islands seem to have somewhere the locals buy top ups etc..
If you plan to use it in an iPad get the shop to activate it first and cut it down for you otherwise take an unlocked MiFi so the whole family can use it which is what I did.
I paid €20 for 500mins of Hotel WiFi when I arrived it was rubbish, everywhere advertised free wifi but most were sponsored hot spots with bad performance and kept dropping connections as soon as you switched the browser to background mode.
I think I spent 300 of my 500 minutes either re-connecting or waiting for pages to load!
Take your own modem and local sim it's the only way to do it...
or leave all your gadgets at home and relax on the beach :-)
Wish I had... My 5yr old 3GS met its maker after I ejected it from a sunbed onto the Pool floor! Now I've had to order a new Galaxy 4s active to replace it when I get back!