I’m using 6.57e and openAT 3.14 on an Q2400+. I’m using the sample code but using an SMS to initialise the download. Everything works fine until I configure the unit with AT+IPR1200. In this case the download completes, it attempts to install the new application, and then the unit hangs. The module appears completely dead, even after a power cycle. The LED does not show any activity and I can’t get any response via the serial port. I have no idea why configuring the serial port speed should affect an over the air download. This is a major problem for us at the moment.