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  1. Jul 2021
    1. Your AT&T Wi-Fi Gateway uses smart Wi-Fi technology to automatically select the “best and fastest connection” for your devices to supply more consistent coverage. But sometimes, the “Gateway Authentication Failure ATT” error sprung up while connecting to the web with a U-Verse modem. It always indicates an issue with the configuration of settings. It also occurs because of the build-up of corrupt launch configurations by the router. Try to restart your Gateway.