The CU515 is a cell phone manufactured by LG. AT&T branded the phones because they are locked to the AT&T network. You cannot use a SIM card issued by another GSM wireless network provider in an AT&T branded CU515 phone unless the phone's SIM lock is released. To release the SIM lock you must obtain the SIM unlock code unique to your phone. Entering this code in the phone will override the lock.
Instructions
Preparation
1. Turn on the phone. Dial *#06#. The phone's unique IMEI number will appear on the display. Record this number.
2. Press and hold the "End" key to turn off the phone. Firmly press down and push back on the phone battery cover to release it from its lock. Lift off the battery cover. Pull out the battery.
3. Slide out the AT&T SIM card currently installed in the phone. The SIM card slot is located inside the battery compartment. If you have a SIM card issued from an alternate network provider, insert it. Otherwise, leave the SIM card slot empty.
4. Reinsert the phone's battery. Replace the battery cover.
Get the Unlock Code for Your LG CU515 Phone
5. Determine if you meet the eligibility requirements to obtain the unlock code for your phone for free from AT&T.
AT&T will provide the SIM unlock code for an AT&T branded phone to current and former customers if:
You have completed at least 90 days of active service with AT&T and your account is in good standing.
All exclusivity agreements with your AT&T phone plan have expired.
AT&T has the unlock code for your phone on record or can easily obtain it.
If you meet the eligibility requirements go to Step 2. If you do not meet the eligibility requirements go to Step 3.
6. Contact the AT&T wireless customer support center. Tell the customer service representative that you want to obtain the SIM unlock code for your LG CU515 phone. The representative will verify your eligibility then ask you for your phone's IMEI number. This number is needed to retrieve the unique unlock code for your phone.
7. Order the unlock code for your phone from a commercial SIM unlock service such as cellunlocker.net or unlockitnow.com.
Unlock the Phone
8. Turn on the phone. "Invalid Smart Chip" will appear on the phone's display.
9. Dial *#865625#.
10. Press the soft key (the button labeled with the dash symbol) under "Yes."
11. Enter the unlock code for your phone. Press the soft key under "OK." If the correct code was entered successfully "Network Lock Deactivated" will appear on the phone's display. The phone is now unlocked.
Tags: your phone, code your, unlock code your, code your phone, unlock code, unlock code