General Informations regarding CID, CDA, COLOR, GDFS etc

General Informations regarding CID, CDA, COLOR, GDFS
etc.






English:


CID :


This "number" defines
the version of SE's protection present in the phone.New CIDs are deployed from
time to time, for the sole reason of preventing them from beeing unlocked/flashed/tampered
with by non-SE service tools. Current CIDs in use by SE are 29/36/37/49.
SE-based LG/Sharp phones use the same system (but different versions). The OTP
(One Time Programmable memory) and EROM of a phone might be protected by
different CIDs, usually the case in newer K600s/K608s.


CDA :


This "number" defines
which variant of a specific firmware a phone is supposed to have.It lets among
others SEUS (Sony Ericsson Update Service) know which
language-pack/branding/bandlocks a phone is to be flashed with. A generic
(unbranded) K750 for use in Scandinavia will
be CDA102337/12, whilst a Telenor-branded K750 will be CDA102338/62. Both will
be flashed with the same languages/dictionaries, but the latter will be flashed
with Telenor-branded firmware.


BLUE/BROWN/RED:


This "color" defines
what kind of phone we are dealing with.BLUE phones has been assembled at the
factory, but never been programmed with software/GDFS/IMEI (remember kids: the
IMEI is stored in the OTP (One Time Programmable memory))BROWN phones are
"developer phones", for testing. Less restrictions are present, as
these are used for "debugging/beta" purposes. As of CID36, a phone
has to be converted to BROWN to unlock it.RED phones are your typical retail
ones.


GDFS:



This is the phones "stash", where all settings and calibration data
is stored (this also goes for the firmwares IMEI-resource as well as the
SIMlocks). Similar to other brands use of NVRAM (Non-Viotile Random Access
Memory).


IMEI :


International Mobile Equipment
Identity.A 15-digit number which includes information on the origin, model, and
serial number of the device. The model and origin comprise the initial 8-digit
portion of the IMEI, known as the "Type Allocation Code/TAC". The
remainder of the IMEI is manufacturer-defined, with a "Luhn check
digit" at the end (which is never transmitted). The "Luhn check
digit" is calculated from the rest of the IMEI.
It should be noted that in SE-based phones, the IMEI is stored in two places,
the OTP (One Time Programmable memory) and GDFS. The GDFS IMEI is normally read
from the OTP, but this can be circumvented by SETool function to
"change" the IMEI. This patches the firmware into allowing different
OTP/GDFS IMEIs. It is the GDFS IMEI that is reported to the network, so
changing this will "de-bar" blocked phones. SEUS is not fooled by
this, on the other hand, and it should also be noted that doing this is illegal
in most countries.


EMMA :


Service software/solution by SE
themselves. Protected by the EMMA smartcard to prevent non-licensed usage.
Current version is EMMA3, though EMMA2 is still alive (but kinda useless on
newer phones). The EMMA smartcard contains an algorithm that allows EMMA to
communicate directly to/with the phones CID, so performing operations the way
they were intended. The smartcard and its algorithm has not been cracked.
Current EMMA access levels exists:Service Update - Can't unlock phones.Service
Update Pro - Can't unlock phones.Network Operator - Can't unlock phones (but
sure as hell can lock them ).Service Center Std - Can't unlock phones.Service
Center Rc - Can unlock phones, as they have a special version of the smartcard
with a CSCA key.Research & Development - Can unlock phones, as they have a
special version of the smartcard with a CSCA key.


DB2000, DB2010, DB2020, DB2030 :



SEMC (Sony Ericsson Mobile Communications) hardware platforms.
It's something similar to chipset in PC.DB2000 (another name is Marita) is a
GSM+3G(UMTS) capable platform, SE K600/K608/V600/Z800/W900, Sharp 802sh,
902sh, 903sh and LG 3G phones are based on it.DB2010/2012 (Marita
compact) is GSM-only, non-3G, platform. Most not very old and modern SE phones
like K300,K500,K700,K750,S700,W300,W550,W800,Z520,Z530 are based
on this chipset.DB2020 is the newest product of SEMC. K800, K790, K610,
Z710 etc, Sharp 904sh feature this most secure (from SE's point of
view) platform.
db2030 is 3G platform, new platform device sonyericsson like W880 & W888


A2:


A2: * Secure boot ROM is used on the access and application
side to guarantee the integrity of software at startup. This includes code on
all volatile and non-volatile storage. The secure ROM functions can also be
used to verify integrity at run-time.
The Real truth story about A2 Platform device