3 UK says it’ll allow unlimited free Skype-to-Skype calls and instant messages on its network from 1st May 2009. Anyone with one of 3’s Skype-enabled handsets will be able to buy a 3 SIM for £1.99 and talk free to other Skype users. There’ll be no need to buy a top-up and there’ll be no data charges for the calls. In the summer the service will be expanded to compatible handsets that weren’t originally supplied by 3. [Press release]