Why do some short messages keep the mobile phone vibrating and flashing? How to do this short message? I hope the master can explain it and teach it to my younger brother.

That is the so-called MediaTek mobile phone chip vulnerability, most domestic mobile phones will have this vulnerability, but after 2009, most mobile phones have made up for this vulnerability, but after my own personal test, it still has a certain impact. The following is the principle: iMelody(iMelodyRingtoneFormat) is abbreviated as imy format. It is an audio format proposed by Ericsson in 2000, which can insert spaces, vibrations, music and other effects, but not many mobile phones support this file format for playing and ringing.

IMY is one of the general MMS file formats stipulated by China Mobile, but not many mobile phones support this file format for playing and ringing. It also has the property of occupying space.

Small in size and easy to edit, it was once used as a ringtone standard by EMS (Enhanced Short Message).

IMY is a monophonic format (non-chord), and you can write notes directly on your mobile phone.

According to IMY format grammar, the short message you usually receive is a flashing vibration code:

(ledoff ledon，backoff backon，vibeon，@0)

[Switch LED (flashing), switch background light (flashing), turn on vibration], repeat indefinitely.

IMY basic format analysis:

BEGIN:IMELODY

Version:< Version & gt

Format:< format & gt

[Composer: < composer _ name & gt]

Melody:< Melody & gt

End: IMELODY

Detailed explanation of variables:

( 1)& lt； Version & gt: Version number. 1.0/ 1.2

(2)& lt； Format & gt: format number. The value is CLASS 1.0|CLASS2.0.

(3)& lt； Composer _ name & gt: author's name.

(4)& lt； Beat & gt: rhythm. Values range from 25 to 900bpm (beats per minute). The greater the rhythm, the faster the speed. The default value is 120.

(5)& lt； Melody & gt: Melody string

& ltled & gt:led special effects. Lajdorf | Lai Dong

& ltvibe & gt: vibration special effects. " vibeon" | "vibeoff "

& lt repeat & gt: repeat special effects. "("+& lt； Melody & gt+"@ n)"; N takes a value from 0 to infinity.

Imy file can be written by mobile phone (java mobile phone can be written by Anyview, Symbian S.

60 can be edited through the notepad of SIS program. ), you can write by computer, and then transmit it to your mobile phone through infrared, Bluetooth or data cable. Imy files can achieve mute, vibration and other effects by writing programs.

"The mobile phone using MediaTek chip was not transmitted by the outside world and the instructions in the' crash message' were executed, which led to the mobile phone being recruited, violently shocked, black screen and restarted. It is because of the long-term vibration effect inserted in the' crash news' that there will be a severe earthquake and a false crash. "

MediaTek said this phenomenon can be avoided.

Why does this happen only in mobile phones equipped with MTK chips, but not in mobile phones of well-known manufacturers such as Nokia and Samsung? At present, there are very few mobile phones supporting imy audio format files. Internationally renowned manufacturers such as Nokia and Samsung have successively developed their own audio file formats and turned off the function of identifying imy files, so Nokia and Samsung will not have such a fake crash. In addition, according to the requirements of China's Ministry of Industry and Information Technology, domestic machines shipped in 2009 are required to technically avoid such loopholes in MKT chip development. Therefore, the future domestic mobile phones will not be effective for this kind of crash news.

Crash SMS code

The following is the introduction of SMS and the writing of SMS:

In fact, that kind of short message is only effective for the "ringing" mode of mobile phones. If you set your mobile phone to vibrate, it won't work. You can rest assured to watch it.

By the way, when you edit the short message, you must first set the mobile phone to vibration mode, otherwise you can't insert the ringtone. Your mobile phone was tricked first, so you can only buckle the battery to solve the problem.

Crash code

BEGIN:IMELODY

Version: 1.2

Format: CLASS 1.0

Beat: 100

MELODY:(ledoffledonbackoffbackovibeon @ 0)

End: IMELODY

Black screen code

BEGIN:IMELODY

Beat: 1200

Melody: (ledoffbackoffvibeoffr5 ledoffbackoffvibeoffr5 @ 600)

End: IMELODY

Keep shaking

BEGIN:IMELODY

Version: 1.2

Format: CLASS 1.0

Beat: 100

MELODY:(ledoffledonbackoffbackovibeon @ 0)

End: IMELODY

ring

BEGIN:IMELODY

Version: 1.2

Format: CLASS 1.0

Beat: 200

Melody: (ledoffbackoffvibeonr5vibeoffledonbbackonr5 @ 200)

End: IMELODY

``

Put these codes in notepad, and just change the extension to imy format when saving.

But you must put these ringtones in imy format into the audio folder in the phone memory. Only in this way can we get it from the broadcast object.

The instructions in the "crash message" caused the mobile phone to be recruited, violently shaken, black screen and restarted. At present, there are related derivative short messages, such as adding vibration and simple notes and lighting control instructions to imy files, which can produce the effect of music accompanying vibration. In this way, by sending imy format files, ordinary short messages can realize the function of multimedia message effect.