Sonyericcson w910i keeos switching itself off then on.

You can only use a Lebara SIM in an unlocked phone so please make sure your handset is unlocked.

You can unlock the phone on the following websites or go to your local phone shop.

http://www.unlock-mobilephone.co.uk/?gclid=CKeN0LCnhZICFQyhQwodLknY9g

http://www.unlockcentral.co.uk/

http://www.mobileunlock.co.uk/

http://www.mrunlock.com/

http://www.fonefunshop.co.uk/

http://www.theunlocker.co.uk/mobile_phone_unlocking.php

http://www.mobtec.net/

Lebara customer services

software problem install anti virus kaspersky

plese format your phone because it may be affected by virus or either it maybe a software problem

It is because ur phone is effected with VIRUS . This can be removed by formating ur phone memory & Memory card.

Some files might be corrupted. Try reinstall firmware using SEUS from your PC.

plz go to setting and click on phone setting then click on restore factory settings then restart the phone . After restarting the phone load the antivirus

Well, you can try this; Check the behavior of the phone with a new battery and see. A battery problem could cause this. If this does not work, then you would have to check if no key on the phone is stuck. But the second is not likely since a stuck key would cause a phone to freeze.
If this does not solve it, then you would have to see a nearest mobile phone technician since it will be an internal problem on the main board which will require the hands of an experienced person.
Thanks

the firmware need to be flash again in the phone this can be done online at topsony.com or take the phone to a mobile service center to have it done.

This happens when u have half updated software. Best solution is to update ur phone software.
1) Go to www.sonyericcson.com/support
2) Or go to settings in W910i in general tab go to update service where u can see ur current software and also u can update it via air(but keep in mind of the charges).
3) U can also update it from ur nearest sony ericcson service centre.

i have one too and it always turns itself off at least 15 times a day and a red light comes on at the back and the screen is blank. It hangs up on people half way through phone calls, and tells me i have messages wich i don't and comes up with blank messages which i can't delete!! Today it has done the exact same thing again but it has been frozen for over 3hours i have tried taking the battery out and nothing works :(