For those of us that travel international it is becoming more and more important to be able to reach the US and be reached while a way. The good news is there are more options than ever to solve these issues. This article is meant to highlight the latest options. Some will be expanded into greater detail as sub-articles.
Today’s Options:

Reach me at my hotel – Give out the hotel number to family and friends
Reach me on my mobile phone – Either through your existing carrier or with a global sim …

I just downloaded an application called SipPhone, $6.99. It allows to you an existing SIP account on your iPhone to make calls with Wifi. Similar to Skype (Which isn’t sip based) you can use a voip service like Vonage on your iPhone.
There are many VOIP providers Vonage. Voicestick, PhonePower, Callcentric, Gizmo5, etc. If you get this app and are connected to WiFi you will be able to make and receive calls. So if Vonage offers you free or discounted international calling this is an extension of home account.
I am …

We are working on a reference document to help sort through all of the options if you want to use your mobile phone while traveling outside the US. There are many. It really depends on how often you travel out of the country and how many calls you anticipate on making.
Take a look at our guide: Global Connections – A How to Guide on Using Your Mobile Phone Internationally
One company to consider is Telna Mobile. You get a US phone number with low inbound rates and free inbound text messages. …