4G sim card compatibility

Hi, does anyone know if you can use any network providers sim card in the 3G/4G shield? For example can I use a 3 mobile UK 4G sim card in it?

Be great if possible as I already have a 4G sim with unlimited data allowance and would like to use the shield to make a 4G based router for my home raspberry pi network.

Thanks and any advice would be very much appreciated.