Cant remember my phone lock code, i switched it off in a hospital now cant get back in its a w910i

Try correct code from service provider and unlock it...

download sony ericsson update service install and run it the program will uide u how to update your firmware and it should reset your phone code good luck with this

To Unlock the Sony Ericsson W910I Model mobile from the Network lock You can use the Unlock Code You can get the Unlock Code at
http://www.wickedunlock.com/sony-ericsson-w910i/rs11wp9/ and Unlock the mobile following the Free Unlocking Instructions Below............
Sony Ericsson W910i Unlocking InstructionsWarning : Do not enter any wrong unlock codes on your Sony Ericsson W910i mobile phones. If you enter over a certain amount of wrong unlock codes on your Sony Ericsson W910i mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch ON your Sony Ericsson W910i without any SIM Card,
2 - Press the left arrow key/button once,
3 - Press the button * twice,
4 - Press the left arrow key/button once,
5 - The message "Personalize with MNC2" will appear, (or you will have displayed an unlock menu, select the lock you want to unlock)
6 - Enter the Unlock Code.

If your Sony Ericsson W910i does not have a left arrow button/key(e.g. Sony Ericsson W950i) and on a few phones(not all) that have a "JOGDIAL" you must press the "down arrow" key/button instead of the "left arrow" key/button for step 2

hi, as far as my experience has thought me unlock codes are the best method to unlock your phone, i used codes from http://www.prounlocking.com/ to unlock my phone and it worked well jus check if your phone is listed for unlocking

The phone lock code protects your phone against unauthorized use if it is stolen and the SIM card is exchanged. To be able to switch the phone on, you need to enter the four-digit phone lock code. The Sony Ericsson default phone lock code is '0000', but you can change this to any 4-8-digit personal code. When you buy the phone, the phone lock is by default turned off.
Note: For security reasons, your operator, retailer or Sony Ericsson Contact Center cannot retrieve the lock code through the phone or the network. If you forget the code, locked phones must be sent to a service centre.

The default w910i phone lock code is 0000 (four zeros). Use this code, unless someone already changed it in your phone

u cant reset the lock code by your own, its default code is 0000. but if u changed and forgot then u must go to the near by service centre they will charge u very less for it

http://www.sonyericsson.com/cws/support/phones/detailed/phonelockcodeissues/w910i?lc=en&cc=nz


or


To change the phone lock code:

1. From standby, go to 'Menu' > Settings > General (tab).
2. Select Security > Locks > Phone protection.
3. Select Change code and follow the instructions.

To activate the phone lock protection:

1. From standby, go to 'Menu' > Settings > General (tab).
2. Select Security > Locks > Phone protection.
3. Select Protection > On.

cant help with z520 but w910i i can, google a programme called aerix

you will need to take it to a mobile service shop and have it reset from there.