Free sms (Nokia 3210)
*#0000# To view Software Version.

*#746025625# [*#sim0clock#]
Checks if the sim clock can be stopped. Sim clock stop is a kind of stand-by mode which will save battery time. This code doesn't work with software version 4.59.

*#92702689# [*#war0anty#] takes you to a secret menu with 6 choices:

1. Displays Serial Number.
2. Displays the Month and Year of Manufacture (0997)
3. Displays (if there) the date where the phone was purchased (MMYY)
4. Displays the date of the last repairment - if found (0000)
5. makes you capebel of transferring user data if you have the gear for it
6. shows how many hours the phone has been on

Latest software version: V 05.36 NSE - 8/9 (25-07-00)

V 5.31 NSE - 8/9 (24-05-00)
V 5.26 NSE - 8/9 (07-04-00)
V 5.02 NSE - 8/9
V 4.41 NSE - 8/9 (17-08-99)0
V 4.11 (???)
V 3.10 NSE - 8

*3370# - Enhanced Full Rate Codec (EFR) activation. It will automatically restart.
#3370# - Enhanced Full Rate Codec (EFR) deactivation. It will automatically restart.
*4370# - Half Rate Codec activation. It will automatically restart
#4370# - Half Rate Codec deactivation. It will automatically restart
xx# - xx position in Phone Book

Enhanced Full Rate will give you much better sound quality when you enable it. The new Enhanced Full Rate CODEC adopted by GSM uses the ASELP (AlgebraicCode Excitation Linear Prediction) compression technology. This technology allows for much great voice quality in the same number of bits as the older Full Rate CODEC. The older technology was called LPC-RPE (Linear Prediction Coding with Regular Pulse Excitation). Both operate at 13 kilobits.(but you take up more space on the network, so they can charge you more) - Talk-time is reduced with about 5%

Free SMS Tip
1st Way:
1. turn our phone off.
2. turn it on and enter your pin.
3. enter *#746025625# 4. now "SIM CLOCK STOP ALLOWED" will be displayed.
now you can send sms for free. if you turn your phone off and later on you have to reenter this code!!!
In some Networks it doesn't work!!!
2nd Way:
Set Menu 4-3-3 on Usergroup 666 (work with German Networks). It's now the group 999, but it's not tested yet.

Ericsson 10

*#06# for checking the IMEI (International Mobile Equipment Identity)

>*<<*<* for checking the firmware revision information (software release)

>*<<*<*>> n-row text strings. if pressing yes you can check the phones text programming in currently selected language.

Shortcut for Last Dialed call menu
If you for some reason don't want to enter the 'Last Dialed calls menu' by using the 'YES' key you can use the following key stroke instead: First '0' then '#'.

Access menu without Sim card
To access to the menu in your phone without having a card inside do the following: type **04*0000*0000*0000# When display say "Wrong Pin" press NO and you have access to the all menus: Info, Access, Settings, Calculator, Clock, Keylock On?, Mail, Phone book. NOTE if you try this on your phone may stop at Keylock On? menu and you´ll have to take your battery out to turn the phone on again. And this will not care about Phone lock!

A way to (un)lock your cell phone on to the network(subset):
1. Press <**<
2. Then on the display appear and give you two choices: Lock to Network ? and Lock to Network subset? (Use arrow keys to select)
3. Enter the NCK number (code is provided by the SP)
4. You have 5 attemps to do this
5. Then your cell phone will work 'only' with the network
Warning: The Service Provider (SP) Lock menu is used to lock the cell phone to the SP's SIM card. Once the cell phone is locked to a specific operator, if one inserts a SIM card from a different operator the phone will refuse to accept it! The cell phone will however accept another SIM card from the same operator. To activate/deactivate this lock one needs a special secret code that is not available to the end user. Your phone can be locked to a service provider FOREVER by doing this! If an invalid code is entered all five times, the menu will exit and be deactivated! Any further attempt to activate the NCK/NSCK lock Menu will result in the response "Not allowed"! However the NCK/NSCK lock can be recover through a direct clearing in the EEPROM.

www.mikeyankee.20m.com

Sony
Sony CMD-Z 1

Press *#06# to view IMEI

Show Software version and manufacturing date : Press # 8377466 # (#version#)

Sony CMDX 1000

Show Software date : Remove your SIM Card, then press : * # 06 #
and finally press:
[left softkey]
To enter Monitor Mode on Network Option menu:
Menu
9 (Phone Options)
7 (Phone Status)
[Left Display Button] (left MENU key) 7684666 [HangUp Button] (Red HandSet key)



Sony CMD-Z 1

To view IMEI (International Mobile Equipment Identity) number enter *#06#

Show Software version and manufact. date Following procedure will show on your phone the software version in first row of the display and some CPU and OS info on the second and third one.

# 8377466 # (#version#)

On earlier version the above tip may not work, but you can try this one:
In the menu go to PHONE SETTINGS Jog down to: FACTORY SETTINGS and CLICK ONCE

You will see a display "Factory Setting Yes No" . Don’t do anything with this display, leave it as it is.

move the main switch of the phone briefly to the right (briefly means long enough to secure a short electric contact BUT short enough not to switch off the phone!)

Now you key in the following sequence:

# * 0 4

Will display info about sw (?)

Sony C-1

Remove SP lock (For advanced users only):
Just edit your eeprom and at the address 16b-1D8 fill this address with 00