Hi i am paul

Try code from service provider.........

Kindly get it unlocked at www.unlock-zone.com
Regards, jay

K800i Unlock
At Instant-Unlock we specialise in K800i unlock and in particular in K800i unlock codes which means you can unlock your phone with the minimum of fuss.
We concentrate on only the most popular handsets so that we can offer a great service for Sony Ericsson unlock.
Networks lock their phones to protect their revenues, they subsidise the handsets on their contracts and as such they want to maximise the return they get from the contract you take out with them. In an ideal world the network would give you your K800i unlock code on completion of your contract but quite often they make you pay to get your Sony Ericsson phone unlocked.
How to unlock K800i phones
The process for unlocking your Sony Ericsson phone could not be simpler. Simply add the K800i unlock to your shopping cart an on the next screen you will be asked for your imei number and phone model. Once we have this information we can generate your K800i unlock code for you. We also provide Sony Ericsson unlocking instructions on our website so that once you have your K800i unlock code you can instantly enter it into your phone
K800i unlocked
Once you have used our Sony Ericsson unlock service you will then be able to use your phone on any network. Please leave us some feedback on our service so that future K800i unlock customers know what to expect. If you have any questions before order please contact us, we will be happy to help with your K800i unlock enquiries.
Enjoy using your Sony Ericsson unlocked phone.

is unlock by crusier ok is coast is 12000 plz u go any mobile store and unlock it rsss300 only thkkkk

You can try online at topsony.com or take it to a mobile service center

http://mobilezzone.blogspot.com/2008/03/3d-games-sony-ericsson-k800i.html
3D Games Sony Ericsson k800i
http://mobilezzone.blogspot.com/2008/03/sony-ericsson-k800i-wwwhi-mobilenet.html
Sony Ericsson K800i

first. tell us how and where you got it from???

Un-Clocked is temporary, allows free txt and calls for a few minutes.
Un-Locked from a network is what will allow you to use any sim card on your phone.
Go to:
http://www.kingmobilephone.com/pages/remote-unlock.php

have a k800i locked to vodaphone need to un lock it any ideas

Hi,

The phone lock code has probably been changed by the previous owner. You should contact him and ask him for the code.