How to Unlock My Sony Ericsson T290a Cingular Phone
Unlocking your Sony Ericsson T290a is a fairly simple process if you have an unlock code. The Sony Ericsson T290a functions on a GSM network, which means the phone uses a SIM card. A SIM card recognizes the phone owner on a particular network. Without a SIM card, the phone can only make 911 calls. The carrier may provide a free unlock code if your current or past account is in good standing. You can also purchase a code for the Sony Ericsson T290a from an online vendor, such as Unlocking4U or Cell Unlocker.
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Instructions
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Contact your carrier to obtain a free unlock code, or purchase a code online.
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Turn off your Sony Ericsson T290A.
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Detach the back cover of your phone by gently pressing the cover and sliding downward.
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Remove the battery from the battery compartment.
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Record the 15-or 17-digit IMEI number usually located on a white label attached to the battery compartment. You may also obtain your IMEI number by inputting *#06# with your phone's keypad.
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Remove the SIM card from the SIM card holder, and replace the battery.
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Rest the battery cover on the bottom of the phone, and gently move upward until it attaches securely.
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Press and hold the center button on the navigation pad to turn on your phone.
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Push the left arrow button on the navigation pad one time.
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Push the "star" key two times.
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Push the left arrow button one time.
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Enter the unlock code when "Personalize with MNC2" appears on the T290A display screen.
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Tips & Warnings
Look for a money-back guarantee when purchasing a code from an online vendor. This provides added protection if the code does not unlock your phone.
