said by SuperJudge:
I'm curious what a firmware push would do to an incompatible modem.
A 'firmware push' is not an all encompassing one-size-fits-all modem update. Different modems require different firmware files.
An 'incompatible' modem will either not work with the network at all or at a considerably reduced capability. (think DOCSIS2 modem on a DOCSIS3 system). The modem does not support any/all the protocols, frequency ranges, bonding channels, etc.. that the network uses. If the network can see the modem at all, it most certainly has no files to send to it.
An 'unsupported' modem 'might' work with the system, no guarantee. The network will not recognize the modem as supported and will not push any software into it. (because they dont have the files for it)
A 'supported' modem is supposed to work with the system. The network will identify it and push the appropriate firmware when it is deemed necessary.
-Forcing- a firmware update into a differing model or make would almost certainly -brick- the modem. Every firmware updater that I have seen will not even attempt to perform an update, until the receiving hardware is identified and verified as the correct type for that firmware.