M2 LTE D2306 Answering Machine Audio

Recently I rooted my M2 LTE. (KingRoot, took like 30 sec)
One of the first things I did was to find and change the awful answering machine audio file.

I found the audio located in

Code:

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/data/data/com.android.phone/am/greeting_msg/

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In other Xperia forums the audio file had to be the same size as the previous file, but I found with my M2 it didn't seem to matter.

What mattered was the filename and audio encoding.

The data for the M2 answering machine seems to be stored in a mysql database located in:

Code:

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/data/data/com.android.phone/databases/MySql_AM_Db

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But I am lazy and didn't want to mess with that bit.

So here's what I did, as ROOT w/ R/W access to /data on device...
Used Ubuntu Linux command line BTW

• 1st pulled the file from my android device w/ adb to my current directory (Home)
  
  
  

  Code:

  
  

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  adb pull /data/data/com.android.phone/am/greeting_msg/cci2015817202821.amr ./

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• Next I used sox to identify the specific encoding, in this case Adaptive Multi Rate - Narrow Band
  
  
  

  Code:

  
  

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  soxi cci2015817202821.amr

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  Here's what I got:
  
  
  

  Quote:

  
  
  
  
  
  

  Input File : 'cci2015817202821.amr' (amr-nb) Channels : 1 Sample Rate : 8000 Precision : 16-bit Duration : 00:00:07.30 = 58400 samples ~ 547.5 CDDA sectors File Size : 11.7k Bit Rate : 12.8k Sample Encoding: AMR-NB

  
  


• Then I took my custom greeting and converted it into the correct format w/ sox and renamed the file to match the old greeting.
  
  
  

  Code:

  
  

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sox greeting.wav greeting.amr-nb
mv greeting.amr-nb cci2015817202821.amr

  ---

  
  


• Finally I pushed the new greeting to the device (as root).
  
  
  

  Code:

  
  

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  adb push ./cci2015817202821.amr /data/data/com.android.phone/am/greeting_msg/

  ---

  
  

Then I went to my Answering Machine on the device (Phone->Menu->Disable Answering Machine for some weird Sony reason) and played my message and :D wham-o! New audio!
Called myself just to be sure and all was good. :cool:

Happy Hacking