Hi Jupiter, I work with EC200T. It works fine with Ofono and is pretty stable. QMI is not used nor tested. I have never worked with EC200U. Yours sincerely, Sergei Golubtsov On Fri, Mar 11, 2022 at 10:41 PM Jupiter <jupiter.hce(a)gmail.com&gt; wrote: > Hi Sergei, > > You added Quectel EC200 USB modem last year, does EC200U work with QMI > and AT in oFono? How stable is the EC200U? Are there any issues? > > Apologize for asking you so many questions. > > Thank you very much. > > Kind regards, > > Jupiter >