Verizon, AT&T, and T-Mobile have officially launched ZenKey, a new way quickly log in to apps that leverages the authentication that happens automatically every time your phone connects to the cellular network. Apps must be updated to support ZenKey, and developers have the option of enabling ZenKey as the primary login, or as the second token in two-factor logins, replacing PIN codes sent my text message, for example. Customers must also download the ZenKey app (available for both iOS and Android) to start using ZenKey. Currently, only a handful of apps support ZenKey login, (mostly the carriers' own apps,) but carriers hope more apps will add support.


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