SX56: Unlocked 2 from AT&T. 1 from T-mobile won't let me

[nikoleman]

Hi!
Well i'm new in this forum. Thanks to the ones who are viewing this.

This is what happened:

I brought 3 Siemens SX56 from the US. 2 locked to AT&T (windows 2002 installed), one locked to T-mobile (windows 2003 installed).

As the bootloader was originally 5.22 for the three of them, I did the typical unlock supplied by XDA DEVELOPERS (replacing the original flash with the XDADEV flash and running xdaunlock.exe)

That worked fine with both AT&T units which are already unlocked.
However the T-mobile one refuses to give me the unlock codes when i open xdaunlock.exe (error getting unlocked codes)

For what i've been reading, this is most likely because win2003 was installed in this one and i heard it's harder to unlock. But that's just what i heard.

Could anyone help me unlocking it?
I really appreciate!
Thanks!
Nicolas.

Ps: you can contact me to nikoleman@hotmail.com

[bedukang]

:x hi, thanks for xda unlocking software. i can't seem to unlock me xda II. i have the new XDA 2i.

Read:4, ooFF ( o meaning square)
Failed to do magic

[dabtran]

search this forum for steps on downgrading ur rom to 2002 or even better is to just load the XDA-Developer rom onto it and it'll unlock it. then after that switch back to your original rom

remember to use xda tools to backup ur original rom on ur computer first!

[nikoleman]

Thanks a lot for your response

I already did that. I downloaded the roms from the at&t sx56 and loaded from sd card. The reason i did this is because the xda developers rom wouldn't let me run the upgrade with ppc2003 on it (a usb connection error was displayed)

I installed the 2002 ppc software and after that, i upgraded directly via ActiveSync.

Still i could not get the unlock codes (same error: error getting unlock code).

That's why i need help. Thanks!

[dabtran]

interesting havent heard that one before.. have you tried downgrading to another t-mobile 2002 rom and then after that installed xdadev rom? or maybe downgrade the bootloader?

[almoudamer]

hi
i have same problem as nikoleman
i have a T-mobile pocket pc (i think it is WM2003 beta)
Pw10b1
rom version:4.00.16 ENG T-Mobile
with wallably 5.22 bootloader

i downgrade the bootloader to 5.15 and
the rom to 3.17.03 ENG cooked in kitchen

now infrared is not working and still get error getting unlock code

any help plz

[nikoleman]

yep
in fact that's the only way it would let me do it.
I backuped rom from the at&t ones and writed it to the t mobile. Then upgraded to XDA DEV special edition and it still throws me the "error getting unlock code" error.

Do you know why might this be?