When you are not aware of a possible malware that you can receive through a mobile app, you can’t take any measure against it. An Android security flaw was discovered by researchers from Zimperium company, and it shows that it is quite possible that you receive random attacks through MMS videos.
It is true that some apps doesn’t pre-process the media attachments you receive or send, which means that you will be somehow safe before you open a message. Other messaging apps doesn’t help you in this sense.
Anyway, after this discovery, phones like Nexus 6, Blackphone or third-party phones from Samsung or HTC already started to fix this flaw, with no mention if recent devices will get the same treatment. Like it of not, this flaw doesn’t affect Android devices below 2.2 version.Source: engadget