I'm not terribly knowledgeable about cell phones. The edge looks exciting and I like supporting gadgets that are powered by open source, but I live in Japan. Could somebody point me to online info that would let me know whether or not I could use this device to make phone calls here in Japan?
"The Ubuntu Edge is an open device, not locked to any particular network. It works in all countries that provide GSM/3G/LTE-based network services", I quote from the project site. From that it is clear you can use it in Japan with any network that provides GSM/LTE services.
For further information, you can visit this LINK .
I hope that is what you are asking for.