3G and 4G Controller is totally compatible with GSM Controller.Our 4G controller can work in almost all countries.
We will send the 4G controller version according to the shipping address.
For example,if the shipping address is to Australia,we will use the Australia 4G version module
if the shipping address is to USA,we will use the USA 4G version module
Our controller is best designed and working for USA,Australia,Singapore and Europe.