New security exploit found for Android - from Gingerbread versions, up to and including Lollipop 5.1.1.
Details to be released on Aug 8th.
Trying to Disable MMS in the meantime - but unable to do so, since the phone is Carrier Locked. Why do this to your customers?
Have already tried creating a new APN - but the old one is still active and you cannot disable it. MMS messages are still going through since the "Active" checkbox is still enabled on the default sp.koodo.com APN.