Hi, > Executing ifconfig wwan0 up;dhclient wwan0 can't get lease from wwan0 > interface. > I’ve had issues with an E3372 that didn’t accept cdc ncm frames from the linux cdc_ncm driver. Maybe there’s the same issue on the E3131, causing dhcp to fail. I see it’s been worked around since linux kernel v4.2 by adding the flag CDC_NCM_FLAG_NDP_TO_END to the cdc_ncm driver.
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