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The word "brick", when used in reference to consumer electronics, describes an electronic device such as a smart phone, game console, router, or tablet computer that, due to a serious misconfiguration, corrupted firmware, or a hardware problem, can no longer function.
The term derives from the vaguely cuboid shape of many electronic devices (and their detachable power supplies) and the suggestion that the device can function only as a lifeless, square object or paperweight.
In the common usage of the term, "bricking" suggests that the damage is so serious as to have rendered the device permanently unusable.
Cause and prevention
Bricking a device is usually an unwanted consequence of an attempt to update the device. Many devices have an update procedure that must not be interrupted; if interrupted by a power failure, user intervention, or any other reason, the existing firmware may be partially overwritten and unusable. The risk of corruption can be minimized by taking all possible precautions against interruption.
Installing firmware with errors or for a different revision of the hardware, or installing firmware incompetently patched such as DVD firmware that only plays DVDs sold in a particular region, can cause bricking.
Devices can also be bricked by malware (malicious software) and sometimes by running software not intentionally harmful but with errors that cause damage.
Some devices include two copies of firmware, one active and the other stored in fixed ROM or writable non-volatile memory and not normally accessible to processes that could corrupt it, as well as a way to copy the stored firmware over the active version, even if corrupt, so that if the active firmware is damaged, it can be replaced by the copy and the device will not be bricked. Other devices have minimal "bootloader" firmware, enabled usually by operating a switch or jumper, which does not enable the device to work normally but can reload the main firmware.
Soft bricked devices are generally those devices which show some signs of life. A soft bricked device usually boot unsuccessfully and generally get stuck on vendor logo or reboot endlessly. Some of the major reasons for soft brick are invalid or corrupt firmware installation, flashing bad scripts or trying to root the device.
Device can recover from a soft bricked state by simply clearing all the internal memory and flashing the firmware. Sometimes internal memory partitions of the device require to be flashed again in order to recover device from this state.
Hard bricked devices are generally those who show from little to no signs of life. A hard bricked device doesn't power up or show any vendor logo, basically the screen remains blank. Some of the major reasons for hard bricking are installing firmware not made for the device, interrupted flashing procedure or following a flashing procedure incorrectly.
Some other reasons include flashing a root file for a different file or using wrong commands. Some kernel bugs have been known that affect the /data partition in the eMMC chip, which gets corrupted during certain operations such as wiping and flashing.
Recovering from a hard brick is generally considered difficult and requires the use of JTAG to re-flash firmware or replacing the motherboard of the device. In some cases a JTAG repair isn't possible and replacement of the device's motherboard is required.
Some devices that become "bricked" because the contents of their nonvolatile memory are incorrect can be "unbricked" using separate hardware (a debug board) that accesses this memory directly. This is similar to the procedure for loading firmware into a new device when the memory is still empty. This kind of "bricking" and "unbricking" occasionally happens during firmware testing and development. In other cases software and hardware procedures, often complex, have been developed that have a good chance of unbricking the device. There is no general method; each device is different. There are also user-created modifier programs to use on bricked or partially bricked devices to make them functional. Examples include the Wiibrew program BootMii used to fix semi-bricked Nintendo Wiis, the Odin program used to flash firmware on Samsung android devices, or the fastboot Android protocol which is capable of reflashing a device with no software installed.
In principle any device with rewritable firmware, or certain crucial settings stored into flash or EEPROM memory, can be bricked. Many, but not all, devices with user-updatable firmware have protection against bricking; devices intended to be updated only by official service personnel generally do not.
Amongst devices known to have bricking issues are: older PCs (more recent models often have dual BIOSes or some other form of protection), many mobile phones, handheld game consoles like the PlayStation Portable and Nintendo DS, video game consoles like the Nintendo Wii, Xbox 360 and PlayStation 3, PS4, and XBOX ONE, many SCSI devices and some lines of hard disk drives and routers.
At least some older consumer market router models can become unresponsive when the user tries to define a subnet mask that does not contain one contiguous run of 1s and then 0s. If even a single bit is set so that it breaks one of the runs, the router may become bricked, unresponsive to any standard troubleshooting or resolving procedures listed in the manual. Unbricking the router may require opening the case, shorting some jumper pins on the board, then connecting the router by the USB cable to an old PC with USB 1.1 hardware, running a special DOS level program supplied by the manufacturer, and powering the router up. This procedure will flash the router to factory settings and original firmware.
Sometimes an interrupted flash upgrade of a PC motherboard will brick the board, for example, due to a power outage (or user impatience) during the upgrade process. It is sometimes possible to unbrick such a motherboard, by scavenging a similar but otherwise broken board for a BIOS chip in the hopes that the BIOS will work even halfway, far enough to boot from floppy. Then it will be possible to retry the flash process. Sometimes it is possible to boot from a floppy, then swap the old presumably dead BIOS chip in and reflash it.
Online and mobile services
Many newer systems capable of accessing online services (such as the Xbox, Xbox 360, PlayStation 3, and iPhone) have internal hardware-based unique identifiers, allowing individual systems to be tracked over a network and banned from accessing certain online services. Banned systems usually continue to operate for purposes unrelated to the online service, but they are often considered "bricked" by users of the online service.
Mobile telephones have a fixed identification code, the IMEI; a telephone reported stolen can have its IMEI blocked by networks—effectively bricked—although anyone with the necessary expertise and equipment can usually change the IMEI.
In 2011, US Senator Chuck Schumer (D-NY) proposed that phones be "bricked" when reported stolen. Some local police chiefs agreed. In April 2012, the FCC announced that the service would be available later in the year.
- CATB.ORG Jargon File
- What does it mean to “brick” your phone?
- Android OS Memory Corruption Bug
- Unbrick Android phones and tablets
- Hard Brick Bug on Galaxy S II and Note Leaked ICS Kernels
- Neo1973 Debug Board v2/Unbricking - Openmoko
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- Thieves can now change IMEI number
- Helmbreck, Valerie (2011-08-23). Senator wants stolen cellphones "bricked". Finance Tech News, 23 August 2011. Retrieved from http://www.financetechnews.com/senator-wants-stolen-cellphones-bricked/.
- Segraves, Mark (2012-02-10). MPD fights robbery surge, seeks new FCC rule to 'brick' stolen smart phones. WJLA-TV News, 10 February 2012. Retrieved from http://www.wjla.com/articles/2012/02/mpd-fights-robbery-surge-seeks-new-fcc-rule-72491.html.
- Hilton, Shani (2012-04-10). Lanier: FCC and Wireless Carriers To Allow Customers To "Brick" Stolen Phones. Washington City Paper, April 10, 2012. Retrieved from http://www.washingtoncitypaper.com/blogs/citydesk/2012/04/10/lanier-fcc-and-wireless-carriers-to-allow-customers-to-brick-stolen-phones/.