To view IMEI number *#06#To view Software Version enter -> * <- <- * <- * CLR (Use with Care)

The Latest Software Version is under Phone Info.

To fine tune sound and clean up any echos, place the 388 into the car kit HF 2600.

Then close all windows, engine off and type * # * # 3. The E 388 will fine-tune itself in about a few seconds.

To activate operator lock <- * * <- (This locks the phone to one carriers SIM card - Use with lots of care)

Press Yes to lock and No to notlock. You can also use the codes below to undo this function. USE AT OWN RISK

I have tested the function Lock to SP... At least on the 337 there's a submenu:

Enter SPCK-code. There are 5 attempts, which is showed (05 attempts).
At final attempt the phone beeps as a warning, 'this is the final try', when entering the menu... Wrong code exits the menu, so you are not stuck in something...

When you have tried to enter the code (wrong) all five times, the menu is deactivated, and you'll get: 'Not allowed' when entering <-**<-
Accessing the Service Program that is not provided with the 388
.
1. Connect the 388 to Cable with RS232/TTL converter.
2. Set Comport to 9600bps, 8 data, 1 stop, no parity.
3. Power ON, wait for "2" and send "0B" to the phone. DO NOT Press ENTER.
4. R should be on screen.
5. Send TEST.BIN. (Send as a binary file)
6. 388 should answer "SP,OK".
7. R should be on screen.

DO NOT write or read from the IMEI or SPCK area! If you try that you can send the phone to service at once, because you will automatically write FE or EF to EVERY cell in the EEPROM. In other words, all the calibration values for the radio is overwritten... (NOT good)
Some commands in the ServiceProg:
eere read from eeprom
eewe write eeprom
lime xxxx xxxx xxxx xxx