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Help Galaxy S (SGH-T959) from T-mobile * unlock

Bought a locked T-mobile Samsung Galaxy S T959 in the US 1 year ago!
*Changed provider and phone was asking for "SIM Network Unlock Code"
*Got an unlocking code
* They provided me with an unlocking code that worked fine until yesterday(I had to put the code once every 1-2 months)
*Yesterday, by mistake I put the unlocking code they provided me wrong 3 times in a row
*Result : Phone asks me for SIM Network Unlock PIN


Any ideas?
Tks a lot
 
1. Turn device ON without SIM card.
2. Go to to phone dial screen and DIAL: *7465625*638*# it will bring you to the NETWORK LOCK screen.
3. in MCC/MNC field enter code for the service provider you want to use your phone with (eg 31026 for T-Mobile USA) - check here for list of codes: Mobile Network Code - Wikipedia, the free encyclopedia
4. In CONTROL KEY field enter the UNLOCK code (if u had one)
5. Hit OK
6. LOCK SUCCESSFUL
 
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