How to Unlock a Samsung Pro Duo Phone
The Samsung D880 Duos is a quad-band Global Systems for Mobile Communications (GSM) based telephone that is capable of supporting to Subscriber Identity Modules (SIM) cards. Additional features of the Samsung D880 Duos include a color display, Bluetooth, messaging, a 3.15-megapixel digital camera and a speakerphone. The Samsung D880 Duos was originally released in late 2007. The phone is normally sold with a carrier lock meaning you can not use the device with another cellular service provider's SIM card. It is, however, possible to unlock the Samsung D880 Duos so that you can use the phone with another cellular service provider's SIM card.
Instructions
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1
Purchase a SIM card from another cellular service provider. You can generally purchase both pre and postpaid SIM cards from any GSM cellular service provider worldwide. SIM cards are available online and at cellular service provider's retail outlets and service centers.
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2
Call your current cellular service provider and request the unlock code for your Samsung D880 Duos. In the United States, cellular service providers will generally give you the unlock code for your cellular phone free of charge provided you have an active account in good standing. It is also possible to purchase the unlock code from a company that specializes in selling unlock codes for cellular telephones. Write down the unlock code for your Samsung D880 Duos.
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Remove the back cover and battery from your Samsung D880 Duos. Under the battery compartment, you will find your existing SIM card. Remove your existing SIM card and insert the SIM card you purchased in Step #1. Replace the battery and back cover. Power on your cellular telephone.
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Type "#7465625*638*CODE#" using the keypad on your Samsung D880 Duos. In the aforementioned sequence replace 'CODE' with the unlock code you wrote down in Step #2. Your Samsung D880 Duos is now unlocked and you can successfully use your phone with the new SIM card.
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Tips & Warnings
Take care when entering the unlock code. Too many unsuccessful attempts to unlock your Samsung D880 Duos can result in a permanently disabled phone.
