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)