Having switched my mobile provider to Plusnet I find that I cannot connect to certain Greek networks. I can find Cosmote ( the most reliable Greek network ) when making a search from my phone settings but I cannot register with Cosmote as it won't accept my SIM. The other 2 networks which come up are WINDGR and Vodafone GR. Which networks does Plusnet have an agreement with? I didn't have this problem last year with my old mobile provider.