Keitai Tools is a python tool for extracting valid DoJa files from a variety of phone file systems.
  - Download [[https://github.com/memory-hunter/keitai-tools|keitai-tools]] from GitHub
  - Copy the top level java folder into the keitai-tools project. NOTE: This folder has different names on different devices including "java," "javaap," and "LIST" Choose the lowest possible folder that still contains all java apps in subfolders.
  - Use the following command, changing the name of the folder based on the phone that you have 
<code>python kttools.py top_folder_directory</code>

Example:
For F-03B, the top folder directory is "Java"
<code>python kttools.py Java</code>

**SPECIAL INSTRUCTIONS FOR EARLY FUJITSU PHONES**

Early Fujitsu phones often lack .jam files. These files need to be recreated by Keitai Tools.
To recreate the .jam files, you will need to set up the environment with the following commands

For Windows:
<code>python -m venv venv
venv\Scripts\activate.bat
pip install construct scsu</code>
For Linux:
<code>python3 -m venv venv
source venv/bin/activate
pip install construct scsu</code>
After setting up the environment, you can proceed with Step 3 above.