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To Unlock the Sony Ericsson K550i Mobile from the Network Lock You can use the Unlock Code,You can get the Unlock Code at http://www.wickedunlock.com/sony-ericsson-k550i/rs11wp9/ and Unlock from the Security lock use the Master Reset Code.
try to do by following method
Warning: Do not enter any wrong unlock unlock codes on your Sony Ericsson K550i mobile phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch ON your Sony Ericsson K550i mobile phone 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 K550i mobile phone 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 & 4. We mean by "Down Arrow" to direct the Jogdial down! In the Sony Ericsson W950i and some other models, the down arrow button/key would be located on the side of the phone.
You can get the unlock code for your Sony Ericsson K550i from www.Theunlockarena.com . This site provides excellent service in unlocking solutions. The unlocking codes provided here are 100% accurate and very affordable. The unlocking process is very simple here. Here are the steps for unlocking Sony Ericsson K550i,1 - Switch ON your Sony Ericsson K550i 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.
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