You should have a PUK number, on the plastic card where your sim card was. Enter 2-3 more pin numbers and your phone will lock itself and request the PUK number... tap it in and hey! presto.
PUK number is available from your service provider.
If you mean unlock sim, to make your phone work on any network. Most shops will do it for you for a couple of £s.
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turn on my phone &it asks for a password . my 13 year old was muckn around with it. i`ve tried ramdom numbers like 55555 12233 birthdates
samsung SGH-D500 i forgot the lock code
and i accidently threw away the document with the puk no
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