gentoo-overlay/net-misc/modemmanager/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<herd>gnome</herd>
	<use>
		<flag name="mbim">Enable MBIM modem protocol</flag>
		<flag name="qmi">Enable support for the QMI modem protocol used by
			devices with Qualcomm chipsets</flag>
		<flag name="qmi-newest">Avoid deprecated QMI commands. Warning: may
			cause incompatibility with older devices.</flag>
	</use>
</pkgmetadata>