Yes, it will. The default SIM card only works in Europe, but you can swap the default card with your local SIM card wherever you are and use the device without limitations.
For third party SIM cards, you need to enter APN - ask your local operator.
IMPORTANT: Devices sold in Europe only work with 2G network, so they will not work in the USA and some other regions. If you are going to travel to some specific region and are not sure if Monimoto works there - please check with us.