Mods please feel free to move to a better home, but I know that there are a lot of TATL travellers here...

I visit New York a couple of times a year and, when there, it would be nice to have a US cell phone number that I could be contacted on (and contact other people). I could use my work mobile but that is something like £1.35 per minute to make a call and £1 per minute to receive. I don't think that my employer would be too happy to pay for that...

Can anyone recommend a SIM only deal where the number doesn't expire after 90 days (as the T-Mobile PAYG plan does), and where you don't have to charge it up with a huge amount? I guess I'd probably only need 60 minutes per year or so...

Thanks for your help.