The premise is relatively simple—an attacker only needs your phone number to take total control of your Android device by sending an MMS with the malicious code embedded in it. This means that, theoretically, a hacker could send you an MMS message while you were asleep, take control over your phone, then remove all traces of the attack while you remained none the wiser.
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Since the exploit works by sending an MMS that is automatically downloaded by your phone, the only way to prevent this attack is to set your phone to not automatically download MMS messages.
