How to Unlock a Z310i Phone
The Sony Ericsson Z310 is a clam-shell style, quad-band GSM (Global Systems for Mobile Communications) cellular telephone that was released in late 2006. The phone has been discontinued and is no longer in production, as of October 2010. The Sony Ericsson Z310 features a color display, a speakerphone, messaging and Bluetooth capability. The phone was normally sold with a carrier lock, which prevents you from using the phone with another cellular service provider's Subscriber Identity Module (SIM) card. You need to unlock the phone to circumvent this carrier lock.
Instructions
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1
Call your current cellular service provider and request the unlock code for your Sony Ericsson Z310. In the United States, you can generally get the unlock code from your cellular service provider free of charge, if you have an active account that is in good standing. You can also purchase unlock codes from companies that specialize in unlocking cellular phones. Write down the unlock code.
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2
Remove your existing SIM card from the Sony Ericsson Z310. Slide the back cover off the phone and take the battery out of the phone. Under the battery compartment, you will find the SIM card. Remove the SIM card and replace the battery and back cover. Power on the Sony Ericsson Z310.
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3
Press the "Left Arrow" key once.
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4
Press the "*" key twice.
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5
Press the "Left Arrow" key once.
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6
Enter the unlock code you wrote down in step one. The Sony Ericsson Z310 is now unlocked and you can use the phone with another cellular service provider's SIM card.
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