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Has anyone had success with bringing up Sierra Wireless Aircard A313u USB-WWAN module? (aka AT&T Momentum 4g). It used to work with RPi2 and does not work with RPi3.

When the USB card is inserted, wwan0 interface appears, but it does not send/receive any packets.

Apr  8 20:45:57 raspberrypi kernel: [ 8068.827027] 
        sierra_net 1-1.4:1.7 wwan0: register 'sierra_net' 
        at usb-3f980000.usb-1.4, Sierra Wireless USB-to-WWAN Modem

(The USB gadget works well on a Windows laptop)

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