Ah, all this roaming here there everywhere discussion reminds me of one of my fundamental wishes for a new startup to tackle: create a mobile virtual network operator (MVNO) which essentially just roams everywhere (including the home country) but always picks the strongest signal of all available wireless carriers.

I hate to be in an area and not have coverage. I carry another prepaid sim card around just for that case but obviously that's a different number then. I'll be happy to pay a premium if that was available.

And then maybe one day we can also get rid of the sim cards and just do it in software... I don't get why we still have sim cards.