I have a Fastrack Supreme modem that runs firmware v. 6.63. I tried to upgrade firmware to the one contained in Open AT SDK 2.20 (v7.3), but every time I try I get “ERROR IN HEADER” message. As far as I understand, I can not upgrade from 6.63 to 7.3 directly and have to install a couple of intermediate legacy versions. Can someone tell me which exact versions I have to install and where do I get legacy firmware packages? I couldn’t find them in the “downloads” section for Fastrack Sumpreme.
I also tried to flash FSU with DWL Win, as it is described in Firmware 7.3 release notes, but DWL reported me the following error message:
Thanks in advance.