I want to unlock Sony Experia X8 on Vodafone Ireland network.

It depends on the IMEI of the phone and hence safe if you get it directly from a reputed unlock service provider. I suggest you can approach Mobileunlocksolutions.com and specify the country,locked network of Sony Ericsson Xperia X8.Based on the availability you can get the permanent unlock service and for free instructions visit Mobileunlockguide.com

You can get the sim network unlock code for Sony Ericsson Xperia X8 at reasonable cost from Unlocking4U.com with easy step by step unlocking instructions.This is the fast and permanent unlocking method.

You can unlock your Sony Ericsson Xperia X8 by using unlock code.To get this code at low cost visit the site Simpleunlocking.com here you need to specify the IMEI number of your phone,Country,Network provider to which it is locked.Then they deliver the unlock code to you through mail.Using that code you can unlock your phone easily.After unlocking from Network lock,you can use any GSM network Sim card on your mobile.

To Open Line Your Phone ,you can use the Unlock code,Then Openline means removing the Network Lock ,In Ireland it locked to which Network in IRELAND?
You can get the Unlock code from here
Onlinegsmunlock and Unlock it...

the reason is your phone is network unlocked, so u got to unlock it to use it with other networks, try unlocking it using unlock code from http://www.wickedunlock.com/

unlock it using codes from http://www.prounlocking.com/

Instructions Unlocking Instructions for Sony Ericsson XPERIA X8

How to insert the Unlock CODE into your Sony Ericsson XPERIA X8

1. Power ON your Sony Ericsson XPERIA X8 with an accepted SIM Card.
   
   
2. Press the LEFT arrow or joystick button once.
   
   
3. Press the STAR (*) button twice.
   
   
4. Press the LEFT arrow or joystick button again.
   
   
5. You will briefly see one of the following messages listed on your Sony Ericsson XPERIA X8 display:
   
   
   • Personalized with MNC2
   • Personalized with MNC3
     
     
6. Wait approximately 4 seconds.
   
   
7. The display will indicate "Network" and a picture of a closed padlock.
   
   
8. Press Select.
   
   
9. The display will indicate "Unlock (Net) 5" and "NCK:"
   
   
10. You can now enter the Unlock CODE supplied by UnlockallCellular.com.
    
    
11. Your Sony Ericsson XPERIA X8 will display "Network unlocked" and then "Insert SIM" message.
    
    
12. Your Sony Ericsson XPERIA X8 is now unlocked!
    

If your Sony Ericsson XPERIA X8has a Joystick (for example SonyEricsson K700i), then you must press the DOWN Arrow instead of the LEFT Arrow for step 3 & 5. By DOWN Arrow I mean directing the Joystick down!

You can get the Ireland Country Vodafone Network Unlock code at reliable cost at here
http://www.theunlockspot.com/sony-ericsson-xperia-x8/rs10wp9/ and Unlock it.

To Unlock the Sony Ericsson Xperia X8 model mobile,you can get the Unlock code at here
http://www.mobile-unlocker.com/sony-ericsson-xperia-x8/rs2wp9/ and Unlock the Mobile Ireland Country Vodafone Network Lock.

you can get unlock codes here http://www.theunlockarena.com/sony-ericsson-xperia/rs13wp9/