All-you-can-eat mobile data is a sweet gift for on-the-go techies, and the\u00a0Karma Go\u00a0gadget delivers it without a contract.\n\n\nSprint, T-Mobile, AT&T and Verizon offer unlimited mobile data plans, but they come with performance caps. And in some cases, such plans are available only to people who signed up for them years ago.\n\n\nKarma Go delivers flexible, unlimited mobile data plans for frequent road warriors. It's a sleek, hockey-puck style device that converts Sprint's 4G LTE\/3G CDMA network signal into a Wi-Fi network.\n\nKarma Go's two data plans\n\nKarma Go gives you two data plan options: for $50 a month, you get unlimited data with speeds up to 5Mbps and as many as three simultaneously connected devices;\u00a0Karma Go also offers a pay-as-you-go option for $14 per GB, or $9.90 for each GB if bought in bulk. With this option, speeds range from 6Mbps to 25Mbps, and you can have up to eight devices connected at once.\n\n\nNeither option requires a contract.\n\n\nKarma Go is simple, but not exactly speedy\n\nIt is easy to set up and use Karma Go. At just 2.3 ounces, it's light enough to carry anywhere, and it is compact, at 2.9 inches by 2.9 inches by 0.47 inches.\n\n\nIn my tests around the San Francisco Bay Area, however, download speeds were sluggish at times. Using the pay-as-you-go Refuel plan, I got between 0.84Mbps and 5.91Mbps, according to the Speedtest app. Upload speeds ranged from 0.37Mbps to 2.17Mbps.\u00a0Even with these relatively slow speeds, I was able to surf the Web, upload files to Dropbox, and play YouTube video clips without significant interruption.\n\n\nThe simple Karma Go apps for Android and iOS let you manage your account; check signal, battery life, and usage; and see the devices that connect to your Wi-Fi network.\n\nNo password protection for your Karma Go network\n\nUnfortunately, you can't password-protect Karma Go's Wi-Fi network. That means people within range could use your device to go online; they'd simply need to have or create a Karma account. Any\u00a0data the person used would not affect your allotment. And I suspect the open nature of the network is designed to make getting online as easy as possible.\n\n\nThat openness could be a concern for security-conscious mobile professionals, but connecting to a VPN may provide some peace of mind. And the people who are most concerned with security probably already use VPNs on public hotspots.\n\n\nMost smartphones today have Wi-Fi hotspot features, of course. So those with casual mobile data needs aren't the ideal recipients of Karma Go. And, of course, it's yet another device to charge, pack, and try not to lose.\n\n\nHowever, if you seek gifts for someone who sorely misses the days of unlimited cellular data, Karma Go is a worthy option.