Thanks so far. The T Mobile tourist plan sounds useful, but I'll be going for more than 3 weeks. And ideally I wouldn't want to tell my friends a different number each time.
Groover, I looked at Google Voice, it seems interesting but a bit complex- that you can get and receive phone calls to and from a (free) US number. While (if necessary) keeping your UK sim in your phone, both in US and UK. But looks like you can only sign up from the US using a US internet IP address. This sounds great, but it would mean I would need to always have wifi access to make or receive calls. If I'm walking down the street, I would need constant mobile data access. So how would you do it? Ie 1) sign up for Google Voice while in the US, and 2) find a US cellphone provider who will offer a sim for data only? Thanks in advance for sharing your strategy.
I am just about to switch to Three network on Pay as You Go for my UK coverage. I looked at Feel at Home and got confused; I will look again. It sounds like an option to call out, but seems the disadvantage is that US people would have to call a UK number to connect with me.
I looked at Vonage website, but it's unclear what option you're choosing. It seems to only have business or residential accounts.
I have friends that just use Whatsapp in the US- but then you're tied to only communicating with people who have cell phones, and cant call restaurants, venders, landlines etc. (And like Google Voice, you're tied to needing wifi access).
So far it seems like Google voice might be a good option. Especially as I will likely need to keep in touch with a number of people and venders (and banks etc) after returning to the UK. It would be great for them to be able to call a US number even if I'm in the UK. But I'd love advice about the best cheapest way to get mobile data via a US sim provider. Thanks!