Remember Karma? It's OK if you don't - this data-only MVNO with a focus on sharing has been relying on Sprint's outdated WiMax network since 2012, and isn't actually all that useful in its present form. But Karma is getting upgraded to some sweet, sweet LTE data in just a couple of months. The upgraded Karma Go LTE WiFi hotspot is going on sale in December, but if you act quickly and pre-order you can score $50 off, for a cost of $99 plus whatever data you buy.

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