secret codes just for u

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GSM (Global System for Mobile communication) is a digital mobile telephone system that is widely used in Europe and other parts of the world. GSM uses a variation of Time Division Multiple Access (TDMA) and is the most widely used of the three digital wireless telephone technologies (TDMA, GSM, and CDMA). GSM digitizes and compresses data, then sends it down a channel with two other streams of user data, each in its own time slot. It operates at either the 900 MHz or 1,800 MHz frequency band.
GSM is the de facto wireless telephone standard in Europe. GSM has over one billion users worldwide and is available in 190 countries. Since many GSM network operators have roaming agreements with foreign operators, users can often continue to use their mobile phones when they travel to other countries.
CDMA stands for &Code Division Multiple Access
Definition: The most common and most recent digital cellular technology in North America. What differentiate CDMA from other phone technologies is that in order to carry many conversations over one frequency, it sends all communications in groups of bits mixed altogether, but tags each group, belonging to a specific communication, with a different code (CDMA stands for &Code Division Multiple Access&). Therefore, at the other end, each communication can be rebuilt in the correct order, based on the unique codes attached to certain groups of bits.

Difference between CDMA And GSM
In cellular service there are two main competing network technologies: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA). Cellular carriers including Sprint PCS, Cingular Wireless, Verizon and T-Mobile use one or the other. Understanding the difference between GSM and CDMA will allow you to choose a carrier that uses the preferable network technology for your needs.
The GSM Association is an international organization founded in 1987, dedicated to providing, developing, and overseeing the worldwide wireless standard of GSM. CDMA, a proprietary standard designed by Qualcomm in the United States, has been the dominant network standard for North America and parts of Asia. However, GSM networks continue to make inroads in the United States, as CDMA networks make progress in other parts of the world. There are camps on both sides that firmly believe either GSM or CDMA architecture is superior to the other. That said, to the non-invested consumer who simply wants bottom line information to make a choice, the following considerations may be helpful.
Coverage: The most important factor is getting service in the areas you will be using your phone. Upon viewing competitors' coverage maps you may discover that only GSM or CDMA carriers offer cellular service in your area. If so, there is no decision to be made, but most people will find that they do have a choice.
Data Transfer Speed: With the advent of cellular phones doing double and triple duty as streaming video devices, podcast receivers and email devices, speed is important to those who use the phone for more than making calls. CDMA has been traditionally faster than GSM, though both technologies continue to rapidly leapfrog along this path. Both boast "3G" standards, or 3rd generation technologies.
EVDO, also known as CDMA2000, is CDMA's answer to the need for speed with a downstream rate of about 2 megabits per second, though some reports suggest real world speeds are closer to 300-700 kilobits per second (kbps). This is comparable to basic DSL. As of fall 2005, EVDO is in the process of being deployed. It is not available everywhere and requires a phone that is CDMA2000 ready.
GSM's answer is EDGE (Enhanced Data Rates for GSM Evolution), which boasts data rates of up to 384 kbps with real world speeds reported closer to 70-140 kbps. With added technologies still in the works that include UMTS (Universal Mobile Telephone Standard) and HSDPA (High Speed Downlink Packet Access), speeds reportedly increase to about 275—380 kbps. This technology is also known as W-CDMA, but is incompatible with CDMA networks. An EDGE-ready phone is required.
In the case of EVDO, theoretical high traffic can degrade speed and performance, while the EDGE network is more susceptible to interference. Both require being within close range of a cell to get the best speeds, while performance decreases with distance.
Subscriber Identity Module (SIM) cards: In the United States only GSM phones use SIM cards. The removable SIM card allows phones to be instantly activated, interchanged, swapped out and upgraded, all without carrier intervention. The SIM itself is tied to the network, rather than the actual phone. Phones that are card-enabled can be used with any GSM carrier.
The CDMA equivalent, a R-UIM card, is only available in parts of Asia but remains on the horizon for the U.S. market. CDMA carriers in the U.S. require proprietary handsets that are linked to one carrier only and are not card-enabled. To upgrade a CDMA phone, the carrier must deactivate the old phone then activate the new one. The old phone becomes useless.
Roaming: For the most part, both networks have fairly concentrated coverage in major cities and along major highways. GSM carriers, however, have roaming contracts with other GSM carriers, allowing wider coverage of more rural areas, generally speaking, often without roaming charges to the customer. CDMA networks may not cover rural areas as well as GSM carriers, and though they may contract with GSM cells for roaming in more rural areas, the charge to the customer will generally be significantly higher.
International Roaming: If you need to make calls to other countries, a GSM carrier can offer international roaming, as GSM networks dominate the world market. If you travel to other countries you can even use your GSM cell phone abroad, providing it is a quad-band phone (850/900/1800/1900 MHz). By purchasing a SIM card with minutes and a local number in the country you are visiting, you can make calls against the card to save yourself international roaming charges from your carrier back home. CDMA phones that are not card-enabled do not have this capability, however there are several countries that use CDMA networks. Check with your CDMA provider for your specific requirements.
According CDG.org, CDMA networks support over 270 million subscribers worldwide, while GSM.org tallies up their score at over 1 billion. As CDMA phones become R-UIM enabled and roaming contracts between networks improve, integration of the standards might eventually make differences all but transparent to the consumer.
The chief GSM carriers in the United States are Cingular Wireless, recently merged with AT&T Wireless, and T-Mobile USA. Major CDMA carriers are Sprint PCS, Verizon and Virgin Mobile. There are also several smaller cellular companies on both networks.
Mobile Satellite Service (MSS) is a satellite system which uses portable terrestrial terminals. MSS terminals may be mounted on a ship, an airplane, or an automobile. MSS terminals may even be carried by an individual.
The most promising application of Mobile Satellite Service is portable satellite telephones which will enable phone service anywhere on the globe.
The opposite of Mobile Satellite Service is Fixed Satellite Service (FSS



.:: NOKIA ::.Universal Codes
Code Description :
These Nokia codes will work on most Nokia Mobile Phones
(1) *3370# Activate Enhanced Full Rate Codec (EFR) - Your phone uses the best sound quality but talk time is reduced by approx. 5%
(2) #3370# Deactivate Enhanced Full Rate Codec (EFR) OR *3370# ( Favourite )
(3) *#4720# Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30% more Talk Time.
(4) *#4720# Deactivate Half Rate Codec.
5) *#0000# Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release Date, 3rd Line : Compression Type. ( Favourite )
(6) *#9999# Phones software version if *#0000# does not work.
(7) *#06# For checking the International Mobile Equipment Identity (IMEI Number). ( Favourite )

press and hold # Lets you switch between lines

.:: Samsung ::.

Samsung SGH600/2100DB IMEI number: * # 0 6 #
Software version: * # 9 9 9 9 # albo * # 0 8 3 7 #
Net Monitor: * # 0 3 2 4 #
Chaning LCD contrast: * # 0 5 2 3 #
Memory info: * # 0 3 7 7 # albo * # 0 2 4 6 #
Reset pamieci (SIMLOCK`a removing!!!): *2767*3855#
Reset pamieci CUSTOM: *2767*2878#
Battery state: * # 9 9 9 8 * 2 2 8 #
Alarm beeper: *#9998*289#
Vibra test: *#9998*842#::.
IMEI number: * # 0 6 #
Software version: * # 9 9 9 9 #

.:: Philips ::.
*#3333*# Displays the blocking list.
*#7489*# Displays the security code.
*#06# Displays the IMEI number.
*#8377*# Displays the SW info.

.:: Panasonic ::.
Panasonic gd90 gd93
*#9999# SW - Type the code on switch on , during network seek-Vers. SW and production code Enable ringing and vibration contemporarily Enable vibration with # then increase volume with "tone menu "


Panasonic gd70
*#9999# SW - Type the code on switch on , during network seek-Vers. SW and production code Enable ringing and vibration contemporarily Enable vibration with # then increase volume with "tone menu "

Free SMS Center numbers
From your telephone you can send SMS messages of 160 char. max. to another GSM phoneYour message will be sent through an SMS Center (usually the one that gave your provider) You pay a little fee depending of your provider, BUT YOU WILL HAVE TO PAY something In order for sending SMS without paying anything, you got to change your SMS Center number with these one +491722270300 or +358405202999 or 352021100003


Codes (that they dont tell you in the manual)
To check the IMEI (International Mobile Equipment Identity) type: *#06# Information you get from the IMEI:
XXXXXX XX XXXXXX X TAC FAC SNR SP TAC = Type Approval Code (first 2 digits = country code).
FAC = Final Assembly Code (For Nokia phones FAC=10). SNR = Serial Number. SP = Spare (always SP=0).To check the phone's software (firmware revision information) type: *#0000# ( or for some phones outher then Nokia 61XX you can try *#model nummber# ex. for 8110 *#8110#) Information you can get from the phone's software version: V 3.14 28-11-97 NSE-3 1st line: Software version. 2nd line: The date of the software release.3nd line: Phone type, .Some versions and dates:V 3.14 28/11/97 V4.33 11/03/98 V 4.73 22/04/98 V 5.24 14/9/98


A couple of months ago, I have listed some secret codes on S60 phones to display various useful information. Some of the readers have provided some feedback to me with more secret codes. Here they are:
· *#92702689# (*#war0anty#) - Display the life timer information of your S60 phone, i.e. the total time of phone call (in minutes). Some users have asked how to reset this timer; as far as I know the only way to reset it is by flashing the phone*#7780# (*#rst0*) - This will soft reset your phone. It is different from *#7370# because all data, like contacts, calendar and notes, are not removed. It will only reset the phone settings, such as profiles, themes and shortcuts. The default lock code is 12345.
· . There is another key combination which is used to hard reset the phone (similar to #*7370). It is useful in some cases, for example when the phone cannot reboot. The trick is by switching off the phone then press and hold Call key (Green key) + * key + 3 key + power button for a couple of seconds. Note that you have to press and hold the four keys at the same time; otherwise it won’t reset the phone. This key combination doesn’t work on some S60 phones.




Samsung D500 /E800 secret Mobile Phone codes

Full list of D500 /E800 secret codes
*2767*688# = Unlocking Code
*#8999*8378# = All in one Code
*#4777*8665# = GPSR Tool
*#8999*523# = LCD Brightness
*#8999*3825523# = External Display
*#8999*377# = Errors
#*5737425# = JAVA Something{I choose 2 and it chrashed}]
*#2255# = Call List
#*1200# = AFC DAC Val
#*1300# = IMEI
#*1400# = IMSI
#*7337# = EEPROM Reset (Unlock and Resets Wap Settings)
#*2787# = CRTP ON/OFF
#*2286# = Battery Data
*2767*3855# = E2P Full Reset
*2767*2878# = E2P Custom Reset
*2767*927# = E2P Wap Reset
*2767*226372# = E2P Camera Reset