- #1 Phone Unlocking Site 1-800-507-9077This is a tutorial and instructions on how you can unlock your Samsung SGH-A107 from Gophone At&t free its network.  After you unlock it, you can change to any GSM Carrier. Simply enter an unlock code.You can find your unlock code from you receive the unlock for your Samsung A107 via email from us, here is how you input your code, follow this guide:1. Power on without SIM2. Type in #7465625*638*Unlock code# (8 digit unlock code*)3. Device should say: “Network Lock Deactivated”4. Phone may automatically rebootUnlocking your Samsung phone has never been easier with Cellunlocker.net!