Note: We do not take any responsibility for anything you to do your phone from the guides on this site. Proceed at your own risk.

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.

This is a good check before you buy any phone, especially second hand ones.
If phone is SIM locked you may not be able to switch to other operator.

Here is how to activate the menu:

<**<
Lock to Network? if pressing yes you have 5 attempts to enter NCK.

<**<<
Lock to Network subset? if pressing yes you have 5 attempts to enter NSCK.

WARNING
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"!

;;; Tips & Tricks

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 '#'.

Battery level indicator when turned OFF...
Press 'NO' key quickly once and then wait for about 2 sec for the battery level
to show up in the display at its normal position.

Full Network Name...
You can see the Full Network Name by doing the following:
Go to the network menu, when the phone displays the networks available
(in 'Select net' and 'Edit list' menu) you can press * and you will see the
full name.

Full Operator List...
You can view the full operator list by doing the following:
Go to the 'Edit list' menu under 'networks'. The phone say 'please wait'
(searching for other networks). When finished, Press the < key once,
then YES twice. Now the phone displays the full list. Browse through
the list with the < > keys.

Call a phone number from SMS message...
You can call within a SMS message if the phone number is written in it.
Example of such a SMS message: Call me at 7654321. Just scroll through
the message until phone number appears on the display, then press 'YES' to
call.

Ericsson 628

;

To view IMEI number enter * # 0 6 #

To view Software Version enter -> * <- <- * <- *

To read all programmed texts enter -> * <- <- * <- * ->

To view phone network lock status enter < * * < (wait 3 sec)

To fast dial press phone number pos nr and # (Example: 1 5 #)

To fast dial last number press 0 #

To reset main menu language to english enter * # 0 0 0 0 #

To see battery level while phone is turned off quickly press and release on/off(NO button).

To see Extended menus (on older versions) go to MISSED CALLS, empty directory, press and HOLD right arrow button, choose menu type

To see Extended menus (on newer versions) go to READ, empty directory, press and HOLD left arrow button, choose menu type

To edit phone book Turn on extended menus and choose "EditPh.Bk".

;

;

Command set

The following commands are recongnized by the phone.Use 9600 baud, 1 stopbit, 8 data bits, no parity.

ATA Pick up phone during ring
AT+GMI Manufacturer identification
AT+GMO Request model Identification
AT+GMR Request revision Identification
AT+GMM
ATDxxx; Dial number xxx
ATH Hangup phone
AT+CFUN=? Define levels of fuctionality in the order of power consumed
AT+CFUN=0 Switches off the phone
AT+CBC Query battery level

Each command has to be followed by a 0x0A, 0x0D sequence, that is carriage return - line feed.

These commands will be ackowledged with an 'OK' prompt. An
incoming call is signalled by the string 'RING' sent by the phone at 9600b in normal mode.

;

Portable Handsfree Unit

1 ;;;;; Earphone: 16 Ohm
2;;;; Microphone: <- 2 kOhm
5;;;; Connected to 04 (GND)

Ericsson 688

To view IMEI number *#06#

;

To view Software Version enter -> * <- <- * <- * CLR

To reset phone language to English *#0000#

>*<<*<*> 1-row text strings. If pressing YES you can check the phones 1-row text programming in currently selected language.

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

;

Pinouts

1 = + external power supply. 7.2v @ 600mA.
2 = RS232 input (TTL)
3 = GND (digital)
4 = RS232 output (TTL)
5 = +5V output. Limited.
6 = Test. Switch phone off and provide +5V and switch back on. (set comms at 9600, n,8,1)
7 = Mute (0 - Normal, 1 - In Call)
8 = Internal/external (0 - External Mic/Speak, 1 - Internal Mic/Speak)
9 = GND (analog)
10 = Related to Mic/Speak
11 = BF in
12 = BF out;

Ericsson 788

;

To view IMEI number *#06#

;

To view Software Version enter * -> * <- <- * <- *

Service Provider Lock is * <- <- * but it is now called the ME lock.

There are two options after selecting yes on another menu. These are lock to Network or lock to NetSubet.

;

Command set

The following commands are recongnized by the phone.Use 9600 baud, 1 stopbit, 8 data bits, no parity.

ATA Pick up phone during ring
AT+GMI Manufacturer identification
AT+GMO Request model Identification
AT+GMR Request revision Identification
AT+GMM
ATDxxx; Dial number xxx
ATH Hangup phone
AT+CFUN=? Define levels of fuctionality in the order of power consumed
AT+CFUN=0 Switches off the phone
AT+CBC Query battery level

Each command has to be followed by a 0x0A, 0x0D sequence, that is carriage return - line feed.

These commands will be ackowledged with an 'OK' prompt. An
incoming call is signalled by the string 'RING' sent by the phone at 9600b in normal mode.

;

Portable Handsfree Unit

1 ;;;;; Earphone: 16 Ohm
2;;;; Microphone: <- 2 kOhm
5;;;; Connected to 04 (GND)

;

Pinouts

 

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