Messages from Unknown Source Don't Download

If it were me, I'd just delete those and not try to open or download anything from an unknown source.

 

I agree, might be stagefright and kill your phone

 

1. Did they send you MMS?
2. Are your MMS settings correct?
3. If the supposed senders claim to have not sent you something, I won't open it and ask the sender to examine their phone if it may have been hijacked by a malicious app.

 

MMS stands for Multimedia Messaging, which is a SMS with media content attached to it (photos/videos/audio). In order to receive MMS, you need 2 things:

1) An active data plan and your mobile data turned on. Wi-fi will not work for receiving MMS unless you're using a 3rd party app like Whatsapp.

2) Your APN's need to be up-to-date. APN stands for Access Point Names. They are the key to the gateway that is your mobile data and MMS.

Should you find that all of the above is correct, then your best option would be to contact your network provider and verify that there is no network outage in your area or restriction on your line. If you are able to receive MMS from other lines and download them fine, then it might very well be that the file you are trying to open is either corrupt or malignant.

 

If I do NOT know the sender, I delete it all. don't even look at it.

 

Good decision. Everyone knows in pc email that we shouldn't open attachment from unknown sender. We might as well view mms the same way imo (if I don't know them, I don't care to see what's attached...stragefright patch or not)