Sony Ericsson Secrets

The "additional" value returned at the end are the checksum value

for the returned program memory bytes. Note, the byte-values are always returned in format 0000 and NOT 00. PREA FF Returns the application checksum, takes a few seconds. Notes on the PH 337

1. Calculator mode is NOT available on all PH sw versions.
2. Invoking Calc/RBS mode not available for GH337 sw versions below
R2A
3. SPCK attempts can be changed to 50 instead of the std 5 tries
4. The instruction LIME returns ERR but does not screw up phone
5. The instruction IMEI returns the IMEI no.
6. Pressing YES in response to FLASH? does screw up the unit.

COOL STUFF TO DO

Set ComPort to 115200bps, 8 data, 1 stop, no parity and watch all the phone commands on the screen and so on. Make a call and see what happens as well as shutting down.Pinouts

1 In Voice

2 In +5V=External Power, 0V=Battery

3 Out Ext Speak control

4 Analog GND

5 Out Voice

6 Out +5V=POWER ON, 0V=POWER OFF

7 Out Charger control

8 Digital/DC GND

9 In 0V=normal,+5V=test, +12V=test+flash

10 In Hook

11 In TTL serial in

12 Out TTL serial out

13 In 0V for aprox 1 sec = POWER ON/OFF

14 In DC Power supply