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- How to build and use a programming cable for the Ericsson GH388
-
- This file is an update from a similar page on the 337
-
- ------------------------------------------------------------------------
-
- This file instructs one on how to build a cable to reprogram the GH337 from a standard
- serial port. Much of this info is taken from a file "How to activate built-in calculator
- and RBS-info", author unknown.
-
- Don't try to activate RBS on a GH388 that has revsion R3A date stamp 96W46 -
- the phone won't recieve any calls with RBS activated.
-
- Connect RS232 to phone via a TTL to RS232 converter.
-
- [Dr Who's Note: It occurs to me that some older computers, such as the
- Commodore 64, use TTL levels already, so no conversions is neccessary with
- them. It remains to be seen, however, if they can successfully do 9600 bps]
-
- NOTE! You can NOT connect the RS232 directly to the phone,
- you MUST use a TTL to RS232 converter!
-
- Pin 8 DC GND -> ComPort GND
- Pin 11 RXD (TTL serial data TO phone) -> ComPort TXD
- Pin 12 TXD (TTL serial data FROM phone) -> ComPort RXD
-
- Connect external 5 volts to Pin 9 (FLASH 5/12volts input)
- (Pin 6 SWDC5 [5 volts out] to pin 9 may also work, but have not tried it)
-
- Pin 1 is leftmost pin (near Mic), when looking at the front/bottom.
-
- The communications port parameters should be 8 data bits, 1 stop bit, and
- no parity. Communications speed should be at 9600 bps,
- but if set for 115200 bps, the phones operations are shown as they are
- done (i.e. communicating with RBS, reading SIM, etc.), but this special "test" mode descibed here is not available.
-
- Here's an example, from a GH-337, does the GH-388 display the same info?
-
- From: Dave Plumb
- ----------------------------------------------
- RR_ACT_REQ , PLMN = F432 0003
- MM state 4
-
- Get FCH on ARFCN = 618 Rxlev = -93
-
- Get SCH on ARFCN = 618
- Old TCXO value 128
- Intermediate TCXO value 128
- New TCXO value 128
- FirstPhaseDiff = 1, SecondPhaseDiff = 1
- ----------------------------------------------
-
-
-
- Power on phone by pressing "NO/ENDpwr".
- When performing its powerup sequence the phone will send "2".
- Within 1 second, reply to it by sending the 2 character sequence "0B".
- The computer will respond "R". At this time, you must send it the sequence
- contained in this file jumpserv.bin. The phone
- will respond "SP, OK", and the computer should display "R".
-
- WARNING! There have been suggestions that reading to and writing from certain
- locations in memory (specifically the IMEI and SPCK locations) will erase the
- phones EEPROM! Be Careful!
-
- The PROG 0, PROG 1, PROG 3, and PROG D commands on the GH337 DO NOT work on the GH388. are there other PROG commands that do?
-
- EEWR [address] [value] writes a value to the given address, given in
- hexadecimal. The
- following functions can be done with this. I am sure there are many more. These functions
- require the phone to be turned off, then on again after this programming.
-
- EEWR 03EE 01 = enable built-in calculator and RBS info. 00 =disable
- EEWR 03CF 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D0 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D1 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D2 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D3 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D4 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D5 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D6 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D7 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D8 00 = disable electronic lock, place 00 in all these locations
- EEWR 03D9 00 = disable electronic lock, place 00 in all these locations
- EEWR 03DA 00 = disable electronic lock, place 00 in all these locations
-
- EERE [address] [number-of-bytes] reads the contents of a single memory address.
- Pressing G several times gets wierd features - these still need to be mapped.
- K returns from this mode
-
- PRRE is from the GH-337 - does this work on the 388?
- PRRE [bank] [address] [bytes-to-read] displays the contents of the memory starting at
- [address]. The value at the end is the checksum for the bytes read. [bank] can be 00
- through 7F, [address] can be 0000 through BFFF, and [bytes-to-read] can be 0000 through BFFF.
- PRRE FF returns the checksum of the entire application.
-
- LIME - Learn IMEI. WARNING! There are rumors that this will disable the phone!
-
- IMEI - List IMEI.
-
- SELF - Self Test?
-
- ADCR - ?
-
- FLSH - Flash the EEPROM - WARNING: If not used correctly, will WIPE the Phone!!
-
- KILL - Exit SP (this programming mode)
-
- There is a way to flash the EEPROM, but a special sequence is needed to
- do this. When I get it I will place it on this page.
-