Once in a while I get this bizarre behavior on my iPhone 5's screen with iOS 8.3.1. (The button says 'Approve' - in Hebrew).

I can't say if its SMS/MMS or something else. But it feels like Malware.

  1. Anyone familiar with this behavior or something similar?
  2. What should I do next?

  • 1
    Have you tried to call someone who was unavailable lately? I get similar notifications when the number I have called becomes available (but in my case I can see the number). – Mateusz Szlosek Jun 14 '15 at 12:22
  • Due to iOS' security model, installation of malware is next to, if not completely, impossible. – tubedogg Jun 14 '15 at 18:09

This looks like a "Flash SMS" or "class 0 message", supposedly only available to be sent by your carrier, but available to others via Apps (Apple App Store, Google Play Store) and in some carriers, by prefixing your message with *go.

There are more technical details on this answer at Stack Overflow, specially in this linked article:

As per the SMS specification, after pressing “Dismiss”, the overlay and message disappear and the message is immediately discarded, leaving no trace of its delivery on the phone

I wouldn't worry much, but be sure to check your bills as it may be a sneaky way to forcing you into those pesky SMS subscription schemes, as referenced by this answer here on Ask Different.

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