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Roaming Zone
Home Network Codes System ID Global Roaming Prepaid Roaming Travel Phones
Codes & Tools for Using Wireless Away from Home & Out of the Country
Mobile Network Codes (MNC)
International Roaming Prepaids That Roam
Roaming Code Key Roaming Codes:
The Mobile Network Code (MNC)
The MNC is a 6-digit number used by wireless networks to determine on which network your wireless device should be operating.  
The MNC is transmitted by the cell site and a list of codes is saved in the wireless device.

The System IDentification Number (SID)
The SID is a numeric identifier used by cellular systems to identify the home system of a wireless carrier, and by your cellular device to determine its roaming status.  
The SID is transmitted by the cell site and a list of codes is saved in your wireless device.

Global Roaming
International Wireless Roaming:
The tools you need to roam around the world wirelessly. Find the roaming capabilites of your current phone, roaming with your current carrier, and prepaid phones that can roam outside the US.  Tap the knowledge of those who have gone before you, and don't overlook the wireless travel checklist before you leave home.

Roaming Tools Roaming Tools:
Roaming Zone Resources: