In terms of settings, on 3 a) the basics just seemed to work anyway b) After a few minutes I had a text message from the network which carried network settings. This wasn't requested it was automatic (presumably network detected a new device being used with that SIM) All very easy and painless. On data note that voda T&Cs seem to exclude voip explicity, but since they're shipping devices with this as a standard feature I think they;d struggle to enforce? (I don't think they do anyway?)