Check the dumping hardware overview for a list of known preservation hardware.

If you need help, please come chat with us on the Keitai World (previously Keitai Wiki) discord server.

Extracting Data

1. ktdumper

Reading File Systems

1. assemble_sh704i_d904i
2. b4-ftl-extract
3. fs-tools (FSR_F)
4. various_keitai_assemble (SoFFS)
5. various_keitai_assemble (XSR2)
6. various_keitai_assemble (XSR3)

Reading FAT Images

1. TestDisk
2. TSK-FAT-AutoRecover

File Processing

1. Keitai Tools

Ktdumper is a tool for extracting data from feature phones that are compatible with the Foma debug adapter, which includes all Docomo phones and select SoftBank phones. Please note that ktdumper will not work unless you have the Foma debug adapter.

Ktdumper is compatible with Linux and WSL (Windows System on Linux). It can be used as a command line tool or as a live Linux iso with a GUI.

Ktdumper Command Line

sudo ./ktdumper.sh d904i dump_nand

Before using assemble_sh704i_d904i.py, you must separate the NAND and OOB (out of bounds) data.

1. Download the separate_nand_oob.py script from Github and place it into the folder generated by ktdumper
2. Execute the following script

   python separate_nand_oob.py nand_mixed.bin

3. When given a set of options, select 0 (the other options are not needed for D904i/SH904i devices)

   0: Data = 512 Bytes, OOB = 16 bytes, divisible = True

To remove the FTL:

1. Download the assemble_sh704i_d904i.py script from Github
2. Execute the following command

   python assemble_sh704i_d904i.py nand_mixed_separated_512.bin output.bin

After this, you must use TestDisk to acquire the data.

NOTE: If TestDisk cannot extract the data, try selecting the [UNDELETE] option rather than the [Analyze] option.

1. Download the b4-ftl-extract scripts from Github
2. Place scripts in the same folder as nand.bin
3. EITHER drag nand.bin into b4b4.bat or enter the following command

   python extract.py -s nand.bin output_dir

   This code will unscramble the FTL and place all data into a folder called output_dir

After this, you must use TestDisk to acquire the data.

NOTE: If TestDisk says that the partition(s) can't be recovered, try [UNDELETE] instead of Analyze.

NOTE: This extraction method may not work on WSL. If you are having errors after trying all steps, try switching from WSL to a full Linux installation.

1. Download the FSR_F tools from fs-tools on Github
2. In the FSR_F folder, run the following command

   pip3 install unicorn

3. Place onenand.bin and onenand.oob into the FSR_F folder and run the following commands

   python3 emu.py 14 part_14.bin
   python3 emu.py 15 part_15.bin
   python3 emu.py 19 part_19.bin
   python3 emu.py 1A part_1A.bin

After this, you must use TestDisk to acquire the data.

1. Download assemble_soffs.py from various-keitai-assemble
2. If needed, use Keitai Script's byteswap_2.py script to byteswap the dump
3. Input the following command

python assemble_soffs.py <byteswapped dump>.bin output_dir

• From here, files must be carved out by hand.

1. Download assemble_xsr2.py from Github
2. IF onenand is split into onenand_a and onenand_b, combine the bin files and the oob files
3. Use the following command

   python .\assemble_xsr2.py onenand.bin output_dir

4. In the output directory, select the largest partition and use TestDisk

NOTE: If TestDisk says that the partition(s) can't be recovered, try [UNDELETE] instead of Analyze.