I'm wondering about buying an unlocked Hero with a view to picking up local PAYG SIMs in each country that I want to use it in. With this in mind I thought I'd test out the process by going into local phone shops and asking them whether they would be able to sell me a PAYG SIM if I walked in with an unlocked Hero. I was rather perturbed when a couple of shops said it would not be possible: Carphone Warehouse said that the "WAP" settings were so complicated (in particular, they were too complex to be carried within the SIM) that it would not be practical to expect to buy PAYG SIMs in each country. They said that I would have to be happy with a roaming data deal from a UK provider. Since then I've read on the internet about APN settings. Would these be what Carphone Warehouse were referring to? If so, they don't seem too fearsome. Also, the Hero manual has a very short section about "creating a new access point" which makes it sound very simple. In practice, how easy is it to get hold of the necessary settings and set up a phone for GPRS and 3G data access to a new carrier? Is there an idiot's guide to this anywhere on the internet? I then went to T-Mobile who said that they were unable to supply a PAYG SIM for use with a Hero. Apparently there is something about its "always-on" characteristic that would make this impossible. Is this correct? If so, what exactly is it that would prevent a Hero from being used with a normal 3G SIM? Or is it perhaps the case that I could use a T-Mobile SIM but they won't help me do that because they would prefer me to buy one of their customised "G2" phones?