or never configure it in the first place to work.
that's your fix.
and slashdot editors: MMS IS NOT SMS SO FUCK YOU SLASHDOT EDITOR. it's not even remotely same technlogy.
mms is vulnurable? duh. how about sharing the image preview vuln(presumably) that's actually used since that has much more to it than just mms. but that mms implementation is exploitable is quite a bit less fatal/interesting than sms vuln.
besides than that I'm pretty fucking sure that 950 million android phones (total androids out there) don't have preview of mms in the notifications bar. only a subset has that feature. but the more interesting and potentially attackable route is through anything else that shows images.