LTE-U: on the way to 5G

Ericsson and Qualcomm are promoting their new technology, LTE-U. Is it any better that LTE-A? And what is this combinations of letters supposed to mean, after all?
wifi_insc

Wireless networks are often insecure, and are notorious havens for attackers, who hang out in coffee shops, hotel swimming pools and anywhere else people congregate to the closest...