[reefer45]

Also go ahead and try this:

Power on your phone (Models Z105, Z107v, Z500, Z500V, etc.......)

1- Enter code *7465625*28782# without a sim in the phone
2- Phone will display "Auto Subset Lock: Activated!"
3- Enter code *7465625*28638# without a sim again
3- Phone will display "Auto Network Lock: Activated!"
4- Now insert the sim and enjoy! Phone is Unlocked!

(NOTE: When you change sim to other operator repeat this process to unlock it for that operator also)

I found this in another thread. All credits for the solution to Morfeus of the FuriousTeam!

I myself haven't got a locked Z500 so i cannot try this. But other people confirmed this as working. I'd like to hear more results on this!

I also found a list of service codes. I guess you could use some of them to enter your unlock codes manually(that you read out with WinIMEI).

Check Versions of h/w s/w f/w:

*#1111# S/W Version
*#1234# Firmware Version
*#2222# H/W Version
*#8999*8376263# All Versions Together

Locks:
*#7465625# = Check Locks
*7465625*638*Code# = Enables Network Lock
#7465625*638*Code# = Disables Network Lock
*7465625*782*Code# = Enables Subset Lock
#7465625*782*Code# = Disables Subset Lock
*7465625*77*Code# = Enables SP Lock
#7465625*77*Code# = Disables SP Lock
*7465625*27*Code# = Enables CP Lock
#7465625*27*Code# = Disables CP Lock
*7465625*746*Code# = Enables SIM Lock
#7465625*746*Code# = Disables SIM Lock
*7465625*228# = Activa lock ON
#7465625*228# = Activa lock OFF
*7465625*28638# = Auto Network Lock ON
#7465625*28638# = Auto Network Lock OFF
*7465625*28782# = Auto Subset Lock ON
#7465625*28782# = Auto Subset Lock OFF
*7465625*2877# = Auto SP Lock ON
#7465625*2877# = Auto SP Lock OFF
*7465625*2827# = Auto CP Lock ON
#7465625*2827# = Auto CP Lock OFF
*7465625*28746# = Auto SIM Lock ON
#7465625*28746# = Auto SIM Lock OFF