SonyEricssonJ120i » History » Revision 10
Revision 9 (fixeria, 12/01/2023 08:23 PM) → Revision 10/12 (fixeria, 12/02/2023 05:33 PM)
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h1. SonyEricssonJ120i
This is another ODM phone model based on TI Calypso. *Not yet supported.*
!https://fdn2.gsmarena.com/vv/pics/sonyericsson/sonyericsson-j120-00.jpg!
h2. Specifications
https://www.gsmarena.com/sony_ericsson_j120-1843.php
* GSM 900/1800
* 99 x 44 x 17 mm, 75g
* STN 65k, 96 x 64
* 900mAh Li-Ion battery (BST-37)
h2. Hardware
{{thumbnail(SE-J120i-PCB.jpg)}}
Large versions: attachment:SE-J120i-PCB.jpg.
* DBB: D751749ZPH (well-known Calypso Lite)
* ABB: TI T3025BZQW (Iota)
* RF TRX: Si4210 (Silabs Aero II) - *we don't support it*
* RF PA: SKY77318-12 (similarly to SE K200)
* MX92U832ZCG (audio?)
h3. Flash
* INTEL J030W[0D]YTQ2 (flash+RAM MCP)
* INTEL 28F320W18T (1.8 Volt Wireless Flash Memory, 4 MByte)
h4. Flash dumps
* https://people.osmocom.org/fixeria/dump/se_j120i/J120i_R1A007_CXC1250845_Main.bin -- firmware, dumped using pstool
* https://people.osmocom.org/fixeria/dump/se_j120i/J120i_R1A007_CXC1250845_full.bin -- full flash, dumped using pstool
* https://people.osmocom.org/fixeria/dump/se_j120i/J120i-R1A007-CXC1250845-356325015955496-fc-full.bin -- full flash, dumped using fc-loadtool
** https://people.osmocom.org/fixeria/dump/se_j120i/fc_loadtools.patch
h3. Serial cable
J120i has the standard Sony Ericsson Fastport connector. Refer to [[SonyEricssonJ100i]] for more details.
h2. Bootloader
Similarly to [[SonyEricssonK200i|Sony Ericsson K200i]] and unlike [[SonyEricssonJ100i|Sony Ericsson J100i]], J120i has the boot ROM (see [[CalypsoRomloader]]) enabled.
h2. Stock firmware notes
Below are some notes related to the stock SE's firmware.
h3. AT Modem mode
It's not yet known how to get access to the AT command interpreter.
Some AT commands can be found by running strings on the firmware dump.
<pre>
$ strings J120i_R1A007_CXC1250845_Main.bin | grep "AT[*+]"
</pre>
h3. MMI codes
NOTE: for some codes you need to press the "green" (call) button.
* Standard SE codes:
** @-> * <- <- * <- *@ - service info and tests;
** @<- * * <-@ - lock status;
Found in the firmware dump:
<pre>
$ strings J120i_R1A007_CXC1250845_Main.bin | less
...
*#06#
F*#**837#
*#**785#
*#**664#
*###664#
*#**364#
*#**364*564#
*#**672# -- "OQC" menu (service tests)
*#**372# -= "FQC" menu (service tests/info)
*#**2263*0# -- BAND?
*#**2263*1#
*#**2263*2#
*#**2263*3#
*#**2263*4#
*#**735*0#
*#**735*12#
*#**735*13#
*#**833*2#
*#**833*4#
*#**833*7#
*#**833*3#
*#**778377#
*#**464851#
*#**324#
*#**6360#
F*#**6361#
F*#**6362#
F*#**6363#
F*#**6364#
F*#**266*0#
*#**266*1#
*#**277378# -- ASSERT?
*#**636#
*#**636*0#
*#**636*1#
*#**84637#
*#**767#
*#**3428*0#
*#**3428*1#
*#**3428*2#
*#**778337#
*#**25276#
*#**62683#
*#**3646633*0#
*#**3646633*1#
*#**678257#
*#**33284# -- DEBUG
</pre>
https://www.dcode.fr/t9-cipher is quite useful for guessing the purpose.
