Locate the File: On Android, it is usually found in /Android/data/com.ea.games.r3_row/doc/. On iOS, you generally need a file manager like iMazing or a jailbroken device to access the app sandbox.
: Improper editing can lead to file corruption or bans if synced with online servers. Always create a backup before attempting any changes. How to Use/Edit the File (Android)
Always back up your original character.2.dat before attempting to swap or edit it. If the file is corrupted, you will lose your entire career progress.
The editor's most popular use is bypassing the now-defunct in-app purchase system to unlock cars that are otherwise impossible to acquire in a post-server world.
This method is used to swap one existing item for another existing item.