A SIM Card Explorer is a professional-grade forensic and development tool used to access, view, and manipulate the internal file system of GSM, 3G (USIM), and CDMA (R-UIM) cards. This guide focuses on Dekart SIM Explorer, a leading software in this category. 1. Core Capabilities
SIM Explorer allows you to interact with the raw data on a SIM card, which a standard mobile phone hides from the user.
Live & Offline Analysis: Analyze cards directly through a reader or work with backed-up "image" files without the physical card.
Multi-Standard Support: Compatible with GSM, Nextel, UICC (UMTS/3G), and RUIM (CDMA).
Security Management: View PIN/PUK status, change codes, and unblock cards.
Forensic Verification: Use hash calculations to ensure evidence has not been tampered with. 2. Essential Hardware Requirements
To use any SIM Explorer software, you need specific hardware to bridge the gap between the card and your computer:
PC/SC Compliant Reader: A standard USB smart card reader (like those from Dekart) is required to send ISO 7816 APDU commands to the card.
SIM Adapter: Since most modern SIMs are Nano or Micro, you may need a plastic adapter to fit them into standard-sized reader slots. 3. Operational Guide: Scanning and Browsing sim card explorer
The tool operates by navigating a directory tree composed of Master Files (MF), Dedicated Files (DF), and Elementary Files (EF). Scanning Mode Functionality Smart Scan
Quickly finds standard GSM, USIM, or R-UIM files defined by official standards. Full Scan
Performs an exhaustive search to find proprietary or non-standard files hidden by the manufacturer. Manual Search
Allows users to search for files using specific masks or properties like size. 4. Key Forensic Data Points
Investigators use SIM Explorer to retrieve the following hidden information: Dekart Sim Explorer
Dekart SIM Explorer is a advanced tool for forensics and smart card management, designed for users who need deep, low-level access to the file systems of GSM SIM, 3G USIM, or CDMA R-UIM cards. It acts as a bridge between the complex, secure "black box" of a SIM card and a human-readable interface on a PC. Core Functionality
Live and Offline Analysis: You can perform "live" analysis by connecting a card via a smart card reader or "offline" analysis using existing backup files.
File Management: The software allows you to view, search, and edit the raw data of the SIM card's directory tree. A SIM Card Explorer is a professional-grade forensic
Decoding Power: It interprets raw binary data into human-friendly information, such as contact lists, service provider names, and network settings.
Backup & Security: Users can backup individual files or the entire card, and manage security settings like CHV (PIN) codes. Technical Capabilities
Fast Scanning: The tool features a high-speed scanning mechanism capable of identifying standard GSM/USIM files and even non-standard hidden files.
Universal Compatibility: It works with any SIM card vendor and mobile operator as long as you use a PC/SC-compliant smart card reader.
Advanced Forensic Tools: Targeted at mobile operators, content providers, and investigators, it provides access to the ATR (Answer To Reset) and PLMN/Language codes. Pros and Cons Pros:
Extreme depth of data access compared to standard phone settings.
Clean, human-readable display of complex binary file structures.
Powerful search engine for finding specific data within the card. Cons: Hardware Requirements Most SIM Card Explorers require a
Requires a separate hardware purchase (smart card reader) to function.
Highly technical interface; editing raw files without knowledge can "brick" the card.
While rated highly by professionals (5/5 stars on SourceForge), it is overkill for casual users who just want to see their phone number. Who is it for? SIM Tool Manager - Apps on Google Play
Most SIM Card Explorers require a Smart Card Reader. The most popular models include:
These readers act as a bridge between the SIM card’s gold contacts and your computer’s USB port.
Best for: On-the-go viewing. Apps like SIM Card Manager or SIM Tool Manager on Android act as mobile explorers. While they lack the low-level hex editing of PC software, they are great for reading the card if you don't have a USB reader handy.
Embedded M2M SIMs often store diagnostic logs in custom EFs. A SIM Explorer allows engineers to read these without proprietary dashboards.
An employee quits and factory resets their company iPhone. The IT department needs to know if trade secrets were texted to a competitor. Using a SIM Card Explorer on the employee’s old SIM, admins recover the "Deleted SMS" logs that the factory reset did not wipe (because the reset only wipes the phone memory, not the SIM’s EEPROM).
SELECT (by AID or file ID)READ BINARY (for transparent EF)READ RECORD (for linear fixed/cyclic EF)STATUS / MANAGE CHANNEL (optional)GET RESPONSE (obtain file control parameters)Some EFs (e.g., EF_ICCID) are transparent; others (EF_ADN, EF_SMS) are record-based. The Explorer must detect file type from FCP::FileDescriptorByte and switch read mode accordingly.