Anyone know if the Unicom HK Cross Border SIM cards have access to the LTE network in Mainland China? It looks like the Unicom SIM cards sold through Lvycom and mychinaunicom.com *do* have access to LTE, but I am not sure about the cross border cards. Then if that's the case, there's the question of what will give me faster access to the sites I want to visit: 3G access directly through HK, or LTE access through a VPN.