THIS TUTORIAL IS MADE BY MY OWN AND OWN EXPERIENCE NOT A SITE TUTORIAL AND IT WORKED FOR ME.(DISCOVERED SOLUTION BY PURE HAZARD LOL).
SO THE STEPS GIVEN BELOW WILL GUIDE YOU/.
01- install liquide drivers : acer liquide drivers
http://www.megaupload.com/?d=E5PTHL3O
http://code.google.com/p/acer-liquid-malez-recovery/wiki/howToInstall
02- go to acer support site and download the latest liquide update.(.exe file) not bin or img.
03- for unlock download this file http://www.mcboydesign.fr/media/acer.../amss_mode.zip
04- install the liquide update to your pc without updating the phone.not yet.be patient.
05- you'll find a file called desimlock.xml inside the amss mode.zip folder copy it and past it into the c:\qcn\01 and the 03 folders created with the liquide update utility.
6- a- put your phone in boot mode volume++photo+power the phone vibre 2 times with black screen.(without usb connexion)
b- connect usb cable.(wait for drivers installation)
7- finally launch the update tool and wait.that it's all after reboot your phone will be nice updated and fully unlocked.
and the imei probleme by by.
i'v been tested it my self and it work nicely.
EXCUSE MY BAD ENGLISH.(SORRY).KYOMIC.