No you should replace it after the update, as it will get replaced with the global modem once you flash the new update.I have a Poco F5 Pro (mondrian) and I saw that there's an update of stable ROM from v14.0.26 to v14.0.28. Installing the old ROM made me use the global modem.img. Now, i want to ask, should I replace the modem.img again before installing the v14.0.28 update?