Difference between pages "Windows" and "SIM Card Forensics"

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== Procedures ==
  
'''Windows''' is a widely-spread [[operating system]] from [[Microsoft]].
+
Acquire [[SIM Card]] and analyze the following:
  
There are 2 main branches of Windows:
+
* ICCID - Integrated Circuit Card Identification
* the DOS-branch: i.e. Windows 95, 98, ME
+
* MSISDN - Subscriber phone number
* the NT-branch: i.e. Windows NT 4, XP, Vista
+
* IMSI - International Mobile Subscriber Identity
 +
* LND - Last Dialed numbers
 +
* [[LOCI]] - Location Information
 +
* LAI - Location Area Identifier
 +
* ADN - Abbreviated Dialing Numbers (Contacts)
 +
* FDN - Fixed Dialing Numbers (Provider entered Numbers)
 +
* SMS - (Short Messages)
 +
* SMSP - Text Message parameters
 +
* SMSS - Text message status
 +
* Phase - Phase ID
 +
* SST - SIM Service table
 +
* LP - Preferred languages variable
 +
* SPN - Service Provider name
 +
* EXT1 - Dialing Extension
 +
* EXT2 - Dialing Extension
 +
* GID1 - Groups
 +
* GID2 - Groups
 +
* CBMI - Preferred network messages
 +
* PUCT - Calls per unit
 +
* ACM - Accumulated Call Meter
 +
* ACMmax - Call Limit
 +
* HPLMNSP - HPLMN search period
 +
* PLMNsel - PLMN selector
 +
* FPLMN - Forbidden PLMNs
 +
* CCP - Capability configuration parameter
 +
* ACC - Access control class
 +
* BCCH - Broadcast control channels
 +
* Kc - Ciphering Key
  
== Features ==
 
* Basic and Dynamic Disks, see: [http://msdn.microsoft.com/en-us/library/windows/desktop/aa363785(v=vs.85).aspx]
 
  
=== Introduced in Windows NT ===
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== Hardware ==
* [[NTFS]]
+
  
=== Introduced in Windows 2000 ===  
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=== Serial ===
  
=== Introduced in Windows XP ===
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* [[MicroDrive 120]] with SmartCard Adapter
* [[Prefetch]]
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* System Restore (Restore Points); also present in Windows ME
+
  
==== SP2 ====
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=== USB ===
* Windows Firewall
+
  
=== Introduced in Windows Server 2003 ===
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* [[ACR 38T]]
* Volume Shadow Copies
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* [http://www.scmmicro.com/products-services/smart-card-readers-terminals/smart-card-reader/scr3311.html SCR3311]
 +
* [http://www.scmmicro.com/products-services/smart-card-readers-terminals/smart-card-reader/scr335.html SCR335]
 +
* [http://www.dekart.com/products/hardware/sim_card_reader/ Dekart SIM Card reader]
  
=== Introduced in [[Windows Vista]] ===
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== Software ==
* [[BitLocker Disk Encryption | BitLocker]]
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* [[Windows Desktop Search | Search]] integrated in operating system
+
* [[ReadyBoost]]
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* [[SuperFetch]]
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* [[NTFS|Transactional NTFS (TxF)]]
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* [[Windows NT Registry File (REGF)|Transactional Registry (TxR)]]
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* [[Windows Shadow Volumes|Shadow Volumes]]; the volume-based storage of the Volume Shadow Copy data
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* $Recycle.Bin
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* [[Windows XML Event Log (EVTX)]]
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* [[User Account Control (UAC)]]
+
  
=== Introduced in Windows Server 2008 ===
+
Wiki Links
 +
* [[ForensicSIM]]
 +
* [[Paraben SIM Card Seizure]]
 +
* [[SIMiFOR]]
 +
* [[SIMIS]]
 +
* [[SIM Explorer]]
  
=== Introduced in [[Windows 7]] ===
+
External Links
* [[BitLocker Disk Encryption | BitLocker To Go]]
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* [http://www.forensicts.co.uk SIMiFOR]
* [[Jump Lists]]
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* [http://www.simcon.no/ SIMcon]
* [[Sticky Notes]]
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* [http://www.quantaq.com/usimdetective.htm USIM Detective]
 +
* [http://www.dekart.com/products/card_management/sim_explorer/ SIM Explorer], [http://www.youtube.com/watch?v=P5dJS7g1o_c video demo of SIM Explorer]
 +
* [http://www.data-recovery-mobile-phone.com/ Pro Data Doctor]
 +
* [http://www.becker-partner.de/index.php?id=17 Forensic Card Reader (FCR) - German]
 +
* [http://www.txsystems.com/sim-manager.html SIM Manager]
 +
* [http://vidstrom.net/otools/simquery/ SIMQuery]
 +
* [http://users.net.yu/~dejan/ SimScan]
 +
* [http://www.nobbi.com/download.htm SIMSpy]
 +
* [http://vidstrom.net/stools/undeletesms/ UnDeleteSMS]
 +
* [http://www.bkforensics.com/FCR.html Forensic SIM Card Reader]
 +
* [http://www.dekart.com/products/card_management/sim_manager/ Dekart SIM Manager], [http://www.youtube.com/watch?v=VaBaqZiNW4U video tutorial on how to recover a deleted SMS]
 +
* [http://www.brickhousesecurity.com/cellphone-spy-simcardreader.html Cell Phone SIM Card Spy]
 +
* [http://www.mobile-t-mobile.com/mobile-network/SIM-card-reader.html SIM Card Reader]
 +
* [http://www.download3000.com/download_46892.html Sim Card Reader Software]
 +
* [http://www.freedownloadscenter.com/Utilities/Backup_and_Copy_Utilities/Sim_Card_Recovery.html Sim Card Recovery]
 +
* [http://www.spytechs.com/phone-recorders/sims-card-reader.htm Sim Recovery Pro]
  
=== Introduced in [[Windows 8]] ===
+
== Recovering SIM Card Data ==
* [[Windows File History | File History]]
+
* [[Windows Storage Spaces | Storage Spaces]]
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* [[Search Charm History]]
+
* [[Resilient File System (ReFS)]]; Was initially available in the Windows 8 server edition.
+
  
=== Introduced in Windows Server 2012 ===
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* [[Damaged SIM Card Data Recovery]]
* [[Resilient File System (ReFS)]]
+
  
== Forensics ==
+
== Security ==
  
=== Partition layout ===
+
SIM cards can have their data protected by a PIN, or Personal Identification Number.  If a user has enabled the PIN on their SIM card, the SIM will remain locked until the PIN is properly entered.  Some phones provide the option of using a second PIN, or PIN2, to further protect data.  If a user incorrectly enters their PIN number multiple times, the phone may request a PUK, or Personal Unblocking Key.  The number of times a PIN must be incorrectly entered before the phone requests the PUK will vary from phone to phone.  Once a phone requests a PUK, the SIM will remain locked until the PUK is correctly entered.  The PUK must be obtained from the SIM's network provider.  If a PUK is incorrectly entered 10 times the SIM will become permanently locked and the user must purchase a new SIM card in order to use the phone.  In some cases the phone will request a PUK2 before it permanently locks the SIM card.
Default partition layout, first partition starts:
+
* at sector 63 in Windows 2000, XP, 2003
+
* at sector 2048 in Windows Vista, 2008, 7
+
  
=== Filesystems ===
+
== See also ==
* [[FAT]], [[FAT|exFAT]]
+
* [[NTFS]]
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* [[Resilient File System (ReFS) | ReFS]]
+
  
=== Recycle Bin ===
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* [[SIM Cards]]
The Recycle Bin contains "Recycled" files. Moving files and directories to the Recycle Bin is also referred to as soft deletion, since the files are not removed from the file system.
+
* [http://www.youtube.com/watch?v=w_tcwmzUH6o Troubleshooting the installation of a PC/SC smart card reader (video tutorial)]
 
+
==== RECYCLER ====
+
The Recycler format is used by Windows 2000, XP.
+
 
+
Per user Recycle Bin folder in the form:
+
<pre>
+
C:\Recycler\%SID%\
+
</pre>
+
 
+
Which contains:
+
* INFO2 file; "Recycled" files metadata
+
 
+
==== $RECYCLE.BIN ====
+
The $Recycle.Bin is used as of Windows Vista.
+
 
+
Per user Recycle Bin folder in the form:
+
<pre>
+
C:\$Recycle.Bin\%SID%\
+
</pre>
+
 
+
Which contains:
+
* $I files; "Recycled" file metadata
+
* $R files; the original data
+
 
+
=== Registry ===
+
 
+
The [[Windows Registry]] is a database of keys and values that provides a wealth of information to forensic [[investigator]]s.
+
 
+
=== Thumbs.db Files ===
+
 
+
[[Thumbs.db]] files can be found on many Windows systems. They contain thumbnails of images or documents and can be of great value for the [[investigator]].
+
 
+
See also: [[Vista thumbcache]].
+
 
+
=== Browser Cache ===
+
 
+
=== Browser History ===
+
 
+
The [[Web Browser History]] files can contain significant information. The default [[Web browser|web browser]] that comes with Windows is [[Internet Explorer|Microsoft Internet Explorer]] but other common browsers on Windows are [[Apple Safari]], [[Google Chrome]], [[Mozilla Firefox]] and [[Opera]].
+
 
+
=== Search ===
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See [[Windows Desktop Search]]
+
 
+
=== Setup API Logs ===
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Windows Vista introduced several new [[Setup API Logs|Setup API Log files]].
+
 
+
Also see [http://support.microsoft.com/kb/927521].
+
 
+
=== Sleep/Hibernation ===
+
 
+
After (at least) Windows 7 recovers from sleep/hibernation there often is a system time change event (event id 1) in the event logs.
+
 
+
=== Users ===
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Windows stores a users Security identifiers (SIDs) under the following registry key:
+
<pre>
+
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
+
</pre>
+
 
+
The %SID%\ProfileImagePath value should also contain the username.
+
 
+
=== Windows Error Reporting (WER) ===
+
 
+
As of Vista, for User Access Control (UAC) elevated applications WER reports can be found in:
+
<pre>
+
C:\ProgramData\Microsoft\Windows\WER\
+
</pre>
+
 
+
As of Vista, for non-UAC elevated applications (LUA) WER reports can be found in:
+
<pre>
+
C:\Users\%UserName%\AppData\Local\Microsoft\Windows\WER\
+
</pre>
+
 
+
Corresponding registry key:
+
<pre>
+
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Windows Error Reporting
+
</pre>
+
 
+
== Advanced Format (4KB Sector) Hard Drives ==
+
Windows XP does not natively handle drives that use the new standard of 4KB sectors. For information on this, see [[Advanced Format]].
+
 
+
== %SystemRoot% ==
+
The actual value of %SystemRoot% is store in the following registry value:
+
<pre>
+
Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
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Value: SystemRoot
+
</pre>
+
 
+
== See Also ==
+
* [[Prefetch]]
+
* [[Setup API Logs]]
+
* [[SuperFetch]]
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* [[Windows Desktop Search]]
+
* [[Windows Event Log (EVT)]]
+
* [[Windows XML Event Log (EVTX)]]
+
* [[Windows Vista]]
+
* [[Windows 7]]
+
* [[Windows 8]]
+
  
 
== External Links ==
 
== External Links ==
 
+
* E-evidence Info - http://www.e-evidence.info/cellular.html
* [http://en.wikipedia.org/wiki/Microsoft_Windows Wikipedia: Microsoft Windows]
+
* Purdue Phone Phorensics Knowledge Base - http://mobileforensicsworld.com/p3/
* [http://support.microsoft.com/kb/927521 Windows 7, Windows Server 2008 R2, and Windows Vista setup log file locations]
+
* [http://www.forensicmag.com/articles/2011/04/sim-forensics-part-1 SIM Forensics: Part 1], by John J. Barbara, April 25, 2011
* [http://www.forensicfocus.com/downloads/forensic-analysis-vista-recycle-bin.pdf The Forensic Analysis of the Microsoft Windows Vista Recycle Bin], by [[Mitchell Machor]], 2008
+
* [http://www.forensicmag.com/articles/2011/06/sim-forensics-part-2 SIM Forensics: Part 2], by John J. Barbara, June 15, 2011
* [http://www.ericjhuber.com/2013/02/microsoft-file-system-tunneling.html?m=1 Microsoft Windows File System Tunneling], by [[Eric Huber]], February 24, 2013
+
* [http://www.forensicmag.com/articles/2011/08/sim-forensics-part-3 SIM Forensics: Part 3], by John J. Barbara, August 5, 2011
* [http://www.nsa.gov/ia/_files/app/Spotting_the_Adversary_with_Windows_Event_Log_Monitoring.pdf Spotting the Adversary with Windows Event Log Monitoring], by National Security Agency/Central Security Service, February 28, 2013
+
* [http://www.swiftforensics.com/2014/04/search-history-on-windows-8-and-81.html Search history on Windows 8 and 8.1], by [[Yogesh Khatri's]], April 1, 2014
+
* [http://www.swiftforensics.com/2014/04/search-history-on-windows-81-part-2.html Search history on windows 8.1 - Part 2], by [[Yogesh Khatri's]], April 21, 2014
+
 
+
=== Recycle Bin ===
+
* [http://www.cybersecurityinstitute.biz/downloads/INFO2.pdf Lesson 3 – The Recycle Bin], by Steve Hailey
+
* [http://www.forensicfocus.com/downloads/forensic-analysis-vista-recycle-bin.pdf The Forensic Analysis of the Microsoft Windows Vista Recycle Bin], by Mitchell Machor, January 22, 2008
+
 
+
=== Malware/Rootkits ===
+
* [http://forensicmethods.com/inside-windows-rootkits Inside Windows Rootkits], by [[Chad Tilbury]], September 4, 2013
+
 
+
=== Program execution ===
+
* [http://windowsir.blogspot.com/2013/07/howto-determine-program-execution.html HowTo: Determine Program Execution], by [[Harlan Carvey]], July 06, 2013
+
* [http://journeyintoir.blogspot.com/2014/01/it-is-all-about-program-execution.html It Is All About Program Execution], by [[Corey Harrell]], January 14, 2014
+
* [http://sysforensics.org/2014/01/know-your-windows-processes.html Know your Windows Processes or Die Trying], by [[Patrick Olsen]], January 18, 2014
+
 
+
=== Tracking removable media ===
+
* [http://www.swiftforensics.com/2012/08/tracking-usb-first-insertion-in-event.html Tracking USB First insertion in Event logs], by Yogesh Khatri, August 18, 2012
+
 
+
=== Under the hood ===
+
* [http://msdn.microsoft.com/en-us/library/windows/desktop/aa366533(v=vs.85).aspx MSDN: Comparing Memory Allocation Methods], by [[Microsoft]]
+
* [http://blogs.msdn.com/b/ntdebugging/archive/2007/06/28/how-windows-starts-up-part-the-second.aspx How Windows Starts Up (Part the second)]
+
* [http://msdn.microsoft.com/en-us/library/aa375142.aspx DLL/COM Redirection]
+
* [http://msdn.microsoft.com/en-us/library/windows/desktop/ms682586(v=vs.85).aspx Dynamic-Link Library Search Order]
+
* [http://blogs.msdn.com/b/junfeng/archive/2004/04/28/121871.aspx Image File Execution Options]
+
 
+
==== MSI ====
+
* [http://blogs.msdn.com/b/heaths/archive/2009/02/02/changes-to-package-caching-in-windows-installer-5-0.aspx?Redirected=true Changes to Package Caching in Windows Installer 5.0], by Heath Stewart, February 2, 2009
+
* [http://blog.didierstevens.com/2013/07/26/msi-the-case-of-the-invalid-signature/ MSI: The Case Of The Invalid Signature], by Didier Stevens, July 26, 2013
+
 
+
==== Side-by-side (WinSxS) ====
+
* [http://en.wikipedia.org/wiki/Side-by-side_assembly Wikipedia: Side-by-side assembly]
+
* [http://msdn.microsoft.com/en-us/library/aa374224.aspx Assembly Searching Sequence]
+
* [http://blogs.msdn.com/b/junfeng/archive/2007/06/26/rt-manifest-resource-and-isolation-aware-enabled.aspx RT_MANIFEST resource, and ISOLATION_AWARE_ENABLED]
+
* [http://msdn.microsoft.com/en-us/library/windows/desktop/dd408052(v=vs.85).aspx Isolated Applications and Side-by-side Assemblies]
+
* [http://blogs.msdn.com/b/junfeng/archive/2006/01/24/517221.aspx#531208 DotLocal (.local) Dll Redirection], by [[Junfeng Zhang]], January 24, 2006
+
* [http://blogs.msdn.com/b/junfeng/archive/2006/04/14/576314.aspx Diagnosing SideBySide failures], by [[Junfeng Zhang]], April 14, 2006
+
* [http://omnicognate.wordpress.com/2009/10/05/winsxs/ EVERYTHING YOU NEVER WANTED TO KNOW ABOUT WINSXS]
+
* [http://www.fireeye.com/resources/pdfs/fireeye-dll-sideloading.pdf DLL Side-loading: A Thorn in the Side of the Anti-Virus Industry], by Amanda Stewart, April 2014
+
 
+
==== Application Experience and Compatibility ====
+
* [http://technet.microsoft.com/en-us/library/dd837644(v=ws.10).aspx Technet: Understanding Shims], by [[Microsoft]]
+
* [http://msdn.microsoft.com/en-us/library/bb432182(v=vs.85).aspx MSDN: Application Compatibility Database], by [[Microsoft]]
+
* [http://www.alex-ionescu.com/?p=39 Secrets of the Application Compatilibity Database (SDB) – Part 1], by [[Alex Ionescu]], May 20, 2007
+
* [http://www.alex-ionescu.com/?p=40 Secrets of the Application Compatilibity Database (SDB) – Part 2], by [[Alex Ionescu]], May 21, 2007
+
* [http://www.alex-ionescu.com/?p=41 Secrets of the Application Compatilibity Database (SDB) – Part 3], by [[Alex Ionescu]], May 26, 2007
+
* [https://dl.mandiant.com/EE/library/Whitepaper_ShimCacheParser.pdf Leveraging the Application Compatibility Cache in Forensic Investigations], by [[Andrew Davis]], May 4, 2012
+
* [http://journeyintoir.blogspot.ch/2013/12/revealing-recentfilecachebcf-file.html Revealing the RecentFileCache.bcf File], by [[Corey Harrell]], December 2, 2013
+
* [http://journeyintoir.blogspot.ch/2013/12/revealing-program-compatibility.html Revealing Program Compatibility Assistant HKCU AppCompatFlags Registry Keys], by [[Corey Harrell]], December 17, 2013
+
 
+
==== System Restore (Restore Points) ====
+
* [http://en.wikipedia.org/wiki/System_Restore Wikipedia: System Restore]
+
* [http://www.stevebunting.org/udpd4n6/forensics/restorepoints.htm Restore Point Forensics], by [[Steve Bunting]]
+
* [http://windowsir.blogspot.ch/2007/06/restore-point-analysis.html Restore Point Analysis], by [[Harlan Carvey]], June 16, 2007
+
* [http://windowsir.blogspot.ch/2006/10/restore-point-forensics.html Restore Point Forensics], by [[Harlan Carvey]], October 20, 2006
+
* [http://www.ediscovery.co.nz/wip/srp.html System Restore Point Log Decoding]
+
 
+
==== Crash dumps ====
+
* [http://blogs.technet.com/b/yongrhee/archive/2010/12/29/drwtsn32-on-windows-vista-windows-server-2008-windows-7-windows-server-2008-r2.aspx Technet: Drwtsn32 on Windows Vista/Windows Server 2008/Windows 7/Windows Server 2008 R2], by Yong Rhee, December 29, 2010
+
* [http://support.microsoft.com/kb/315263 MSDN: How to read the small memory dump file that is created by Windows if a crash occurs], by [[Microsoft]]
+
 
+
==== RPC ====
+
* [http://blogs.technet.com/b/networking/archive/2008/10/24/rpc-to-go-v-1.aspx RPC to Go v.1], by Michael Platts, October 24, 2008
+
* [http://blogs.technet.com/b/networking/archive/2008/12/04/rpc-to-go-v-2.aspx RPC to Go v.2], by Michael Platts, December 4, 2008
+
 
+
==== User Account Control (UAC) ====
+
* [http://blog.strategiccyber.com/2014/03/20/user-account-control-what-penetration-testers-should-know/ User Account Control – What Penetration Testers Should Know], by Raphael Mudge, March 20, 2014
+
 
+
==== Windows Event Logs ====
+
* [http://journeyintoir.blogspot.ch/2014/03/exploring-program-inventory-event-log.html Exploring the Program Inventory Event Log], by [[Corey Harrell]], March 24, 2014
+
 
+
==== Windows Scripting Host ====
+
* [https://www.mandiant.com/blog/ground-windows-scripting-host-wsh/ Going To Ground with The Windows Scripting Host (WSH)], by Devon Kerr, February 19, 2014
+
 
+
==== USB ====
+
* [https://blogs.sans.org/computer-forensics/files/2009/09/USBKEY-Guide.pdf USBKEY Guide], by [[SANS | SANS Institute - Digital Forensics and Incident Response]], September 2009
+
* [https://blogs.sans.org/computer-forensics/files/2009/09/USB_Drive_Enclosure-Guide.pdf USB Drive Enclosure Guide], by [[SANS | SANS Institute - Digital Forensics and Incident Response]], September 2009
+
 
+
==== WMI ====
+
* [http://www.trendmicro.com/cloud-content/us/pdfs/security-intelligence/white-papers/wp__understanding-wmi-malware.pdf Understanding WMI Malware], by Julius Dizon, Lennard Galang, and Marvin Cruz, July 2010
+
 
+
==== Windows Error Reporting (WER) ====
+
* [http://blogs.technet.com/b/yongrhee/archive/2010/12/29/drwtsn32-on-windows-vista-windows-server-2008-windows-7-windows-server-2008-r2.aspx Drwtsn32 on Windows Vista/Windows Server 2008/Windows 7/Windows Server 2008 R2], by Yong Rhee, December 29, 2010
+
* [http://journeyintoir.blogspot.ch/2014/02/exploring-windows-error-reporting.html Exploring Windows Error Reporting], by [[Corey Harrell]], February 24, 2014
+
 
+
==== Windows Firewall ====
+
* [http://en.wikipedia.org/wiki/Windows_Firewall Wikipedia: Windows Firewall]
+
* [http://technet.microsoft.com/en-us/library/cc737845(v=ws.10).aspx#BKMK_log Windows Firewall Tools and Settings]
+
 
+
==== Windows 32-bit on Windows 64-bit (WoW64) ====
+
* [http://en.wikipedia.org/wiki/WoW64 Wikipedia: WoW64]
+
 
+
=== Windows XP ===
+
* [http://support.microsoft.com/kb/q308549 Description of Windows XP System Information (Msinfo32.exe) Tool]
+
 
+
[[Category:Operating systems]]
+
[[Category:Windows]]
+

Latest revision as of 02:51, 22 April 2014

Procedures

Acquire SIM Card and analyze the following:

  • ICCID - Integrated Circuit Card Identification
  • MSISDN - Subscriber phone number
  • IMSI - International Mobile Subscriber Identity
  • LND - Last Dialed numbers
  • LOCI - Location Information
  • LAI - Location Area Identifier
  • ADN - Abbreviated Dialing Numbers (Contacts)
  • FDN - Fixed Dialing Numbers (Provider entered Numbers)
  • SMS - (Short Messages)
  • SMSP - Text Message parameters
  • SMSS - Text message status
  • Phase - Phase ID
  • SST - SIM Service table
  • LP - Preferred languages variable
  • SPN - Service Provider name
  • EXT1 - Dialing Extension
  • EXT2 - Dialing Extension
  • GID1 - Groups
  • GID2 - Groups
  • CBMI - Preferred network messages
  • PUCT - Calls per unit
  • ACM - Accumulated Call Meter
  • ACMmax - Call Limit
  • HPLMNSP - HPLMN search period
  • PLMNsel - PLMN selector
  • FPLMN - Forbidden PLMNs
  • CCP - Capability configuration parameter
  • ACC - Access control class
  • BCCH - Broadcast control channels
  • Kc - Ciphering Key


Hardware

Serial

USB

Software

Wiki Links

External Links

Recovering SIM Card Data

Security

SIM cards can have their data protected by a PIN, or Personal Identification Number. If a user has enabled the PIN on their SIM card, the SIM will remain locked until the PIN is properly entered. Some phones provide the option of using a second PIN, or PIN2, to further protect data. If a user incorrectly enters their PIN number multiple times, the phone may request a PUK, or Personal Unblocking Key. The number of times a PIN must be incorrectly entered before the phone requests the PUK will vary from phone to phone. Once a phone requests a PUK, the SIM will remain locked until the PUK is correctly entered. The PUK must be obtained from the SIM's network provider. If a PUK is incorrectly entered 10 times the SIM will become permanently locked and the user must purchase a new SIM card in order to use the phone. In some cases the phone will request a PUK2 before it permanently locks the SIM card.

See also

External Links