This product photo provided by United Online Inc., shows the NetZero 4G HotSpot. The NetZero 4G HotSpot simultaneously supports up to eight Wi-Fi-enabled devices, including tablets and smartphones, ...

NEW YORK — It's like the '90s never left: Billy Crystal hosted the Oscars. Internet IPOs are back. And NetZero is returning with free Internet service —only this time it's wireless. United Online Inc.