Movistar Argentina is working ok on AOKP with the attached build.prop which was posted by mikeymike75 some pages ago.
I changed the default network type to 4 then rebooted.
Then go to Wireless and network setttings, and:
Enable alt OEM telephony code OFF
Enable alternate getIMSI code OFF
Enable World Phone settings. OFF
Set Enable GSM Signal Strength ON.
Reboot and set correct APN for working HSDPA
I use Claro Argentina, but, I'll sure as hell give it a shot.
Thanks a bunch.