# EM9291 how to enable QMI mode? **URL:** \ **Category:** Open AT\ **Tags:** feature-request\ **Created:** [August 22, 2025, 4:00am UTC](https://forum.sierrawireless.com/t/em9291-how-to-enable-qmi-mode/35435 "2025-08-22T04:00:03Z")\ **Posts on this page:** 1\ **Showing post:** 39
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [July 10, 2026, 9:32am UTC](https://forum.sierrawireless.com/t/em9291-how-to-enable-qmi-mode/35435/39 "2026-07-10T09:32:36Z")
have you tested in USB mode in ubuntu PC? Here shows it should enumerate the download port /dev/ttyUSB0 in boot and hold mode: > [@EM9293 firmware upgrade failed](https://forum.sierrawireless.com/t/em9293-firmware-upgrade-failed/35205/4): > > is your module in MBIM mode? Just did a test in Ubuntu PC, no problem is found for my EM9291 module: owner@ubuntu:~/QMI/MBPL/MBPL\_SDK\_R44\_ENG5-fwdwl.bin/SampleApps/fw-download-tool$ sudo ./bin/fw-download-toolhostx86\_64 -l fwdwl.log -f /home/owner/Desktop/EM92\_FW/02.17.08.00/ -m 4 -d /dev/ttyUSB0 -p /dev/cdc-wdm0 -t 1 -w SWIX65C\_02.17.08.00.cwe -n SWIX65C\_02.17.08.00\_GENERIC\_030.081\_001.nvu [sudo] password for owner: Application version: 1.0.2412.2 INFO: QDL Port: /dev/ttyUSB0 INFO: Device P… --- _[View the full topic](https://forum.sierrawireless.com/t/em9291-how-to-enable-qmi-mode/35435)._