The main instruction set of the baseband. You can get these files from
/usr/local/standalone/firmware on the corresponding firmware's restore ramdisk or from an IPSW under
The baseband version that comes with each iPhone firmware is listed on the firmware page and also on the X-Gold 608 article for the iPhone 3G/iPhone 3GS.
Baseband firmware files have been codenamed Trek, ICE, and MAV.
File Structure[edit source]
.bbfw file format is a ZIP archive containing
Options.plist, and multiple firmware files. In the past, these were EEP and FLS files, the external EEPROM and firmware, respectively. In modern iOS versions, these are
For example, the iPhone 4 has a single baseband firmware file. The 4.0 baseband firmware filename is
ICE3_01.59.00_BOOT_02.06.Release.bbfw and contains contains four baseband firmware files.
Known MBN Files[edit source]
The main identifying document for a given Baseband firmware is its
Info.plist. This PList contains the Build, ChipID, RestoreSBLVersion, SBLVersion, and Baseband Version of the firmware.