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hi, please visit below website http://cellunlocker.net/blog/2010/06/15/how-to-unlock-sony-ericsson-k550i/ ant then click HERE. after clicking on HERE you get a new website & fill the information. thanks
Where do you see the red light? On the screen itself? Sometimes this problem occurs because of bad battery contact. Try to remove the back cover by pressing it, and gently sliding it outwards. Afterwards, remove the battery using your nails or something soft. Beware not to break any plastics. Try and using some pressurized air to clean the contacts, and maybe dust and debris that has accumulated inside. Then, place the battery back, with the restrictions drawings side up. close the lid, and restart the phone.
I am sorry but there is no way to enable this in the Sony Ericsson K550. The only phones that are able to do this are usually smartphones that are powered by Symbian or Windows Mobile. Sorry...the only thing you can do is lock the whole phone.