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Old 08-06-2008, 08:54   #1 (permalink)
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Unlocking the User Lock Code on Nokia 2865i

The nokia 2865i cdma phone uses a different encoding scheme for the user lock code than older nokias. And the version of jaf that i have cannot decipher the user lock code on this phone. It states that it's 12345 even though it's really not.

However, jaf does communicate with the phone and can read the PM (permanent memory) section. Here are some notes about the user lock code on this phone that i compiled.

In this case, the user lock code is set to 6969

In this case, the user lock code is set to 12345

Using jaf to erase pm field 183 of pm record 154 results in the user lock code being set to an unknown value. So don't erase this field or leave it blank.

To get back into the phone with the now unknown password, i looked at what values changed in the pm as incorrect lock codes were entered. And then used jaf to erase the corresponding fields.

Record 12 from field 11 erased!
Record 20 from field 11 erased!
Record 0 from field 98 erased!

I also saw a field with a 1 value near this record that looked like a boolean on/off toggle and decided to erase it
Record 13 from field 11 erased!

The phone now booted up without asking for a user lock code anymore.

For record, here's some more info about the phone that i was using:

MCU SW version: V FL100V1000.nep
PCI version:
UEM version: 400
UPP version: 8273
RFIC version: DSP510_FLT_06w13_01_TK2
DSP version: DSP510_FLT_06w13_01_TK2
LCD version: SUEZ
PPM version: V FL100_05w21_50_15.nbr

And i used the gsm nokia 3100 cable with this phone. It didn't quite fit properly into the phone. So i disassembled the phone, removed the motherboard and shielding over the fbus/mbus area and then held the phone adapter onto the motherboard using my hands. If you are going to work on a bunch of these phones, you'll probably want the proper adapter though.
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Old 08-06-2008, 09:21   #2 (permalink)
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here's a little more info about the fields that were erased:

1st boot

0=000100003132333435000000000000000031323334350000 0000000000000F373836353339383130310000000000000000 00000000000000000000000000000000000000373836333638 36343837000000000000000000000000000000000000000000 00000000000037383635333939323937000000000000000000 0000000000000000000000000000000000000101

2nd boot

0=000100003132333435000000000000000031323334350000 0000000000000E373836353339383130310000000000000000 00000000000000000000000000000000000000373836333638 36343837000000000000000000000000000000000000000000 00000000000037383635333939323937000000000000000000 0000000000000000000000000000000000000101

note that F37383635 has become E37383635
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