CDMA, GSM & LTE
Apparently unlike CDMA & GSM the new 4G protocol LTE can offload roaming traffic to local operators which means if you are talking between two UK mobiles that are both on holiday in the US the traffic stays in the US !
Apparently unlike CDMA & GSM the new 4G protocol LTE can offload roaming traffic to local operators which means if you are talking between two UK mobiles that are both on holiday in the US the traffic stays in the US !