Hi rishirich.... I wouldnt bother trying the online unlocking codes , if you enter the codes and they dont work, you have to have the phone unlocked by a proper cellphone technician with a data cable.Avoid the frustration and the many rip off websites offering free unlocking codes ,most of the time they dont work and lock the phone even more...take your sony to a respected repair shop and have it done properly, in the UK it costs about 10 uk pounds to have it properly unlocked to any network....
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When you place a new or a existing SIM card from another phone provider into your mobile phone and it asks for a Security code then :- This phone is locked to the original mobile phone provider. You need to contact this mobile provider to ask for the unlock code (security code) for this phone. You need to provide proof of ownership etc and the phone's unique IMEI number which is located inside the phone under the battery. They use this number to generate the unlock code for your phone. They should provide you with instructions on how to enter this code into the phone. Once you unlock the phone, then you can insert a new SIM card in this phone or sign up with another phone provider using this phone.
You could ring the phone provider and ask for the unlock security code because you are going overseas and wish to use your phone with a prepaid SIM card from another country. This maybe a free service. The other way to get your phone unlock is to use a phone unlocking company on the Internet, they usually charge a couple of Dollars for their services.Use Google and search for "Security unlocking code” companies in your area.
To find out 'PUCK' code you need to contact the maker of your phone or the company that made your phone. In your case, if you were contacting the company, you would ring Sony Erricson.
Whatever you do, do not try to guess your 'PUK' code. You only have a certain amout of guesses. This means if you keep guessing then your 'PUK' code it might get blocked, meaning you will have to geta new phone or a new Sim Card.
First need to find the IMEI for your phone. Power on phone
and type *#06# this will display the IMEI. You will need the IMEI to get the corresponding unlock code. Every phone has a different unlock code. Then call your provider and request the unlock code.
Sony Ericsson - General Step Action 1 Insert non-Cingular
SIM card 2 Power on the handset 3 Press the left Arrow
(<) button 4 Press the star (*)
button twice 5 Press the left Arrow
(<) button - display will
indicate "ME Lock" - wait
approximately 3 seconds - the display
will indicate "Network" and a picture of a closed lock 6 Press Yes - the display
will indicate "Unlock?" 7 Press Yes - the display
will indicate "Enter NCK" 8 Enter the SIM Unlock
code 9 Press Yes The handset will
display "Network" and a picture of an open lock for three seconds
and will then revert to the main display. The handset is then