This guide describes how to unlock the following phone models by USB. If your phone is not listed below, you are on the wrong page—click here to find your model.

B7510, B7510B, B7510L, Beam, Behold II, Corby Android, Corby Smartphone, Dart, DoubleTime, Europa, G3819, GT-B7510, GT-B7510B, GT-B7510L, GT-S5570, GT-S5570B, GT-S5570L, GT-S5660, GT-S5660B, GT-S5660L, GT-S5660M, GT-S5660V, GT-S5670, GT-S5670B, GT-S5670L, GT-S5830, GT-S5830B, GT-S5830D, GT-S5830L, GT-S5830T, GT-S6310, GT-S6310L, GT-S6310N, GT-S6310T, GT-S6312, GT-S6313T, GT-S6500, GT-S6500D, GT-S6500L, GT-S6500T, GT-S7500, GT-S7500L, GT-S7500T, GT-S7500W, GT-S7560, GT-S7560M, GT-S7562, GT-S7562L, GT-S7570, GT-S7572, GT-i5500, GT-i5500B, GT-i5500L, GT-i5500M, GT-i5503, GT-i5503T, GT-i5508, GT-i5510, GT-i5510L, GT-i5510M, GT-i5510T, GT-i5700, GT-i5700L, GT-i5700R, GT-i5800, GT-i5800D, GT-i5800L, GT-i5801, GT-i7500, GT-i7500L, GT-i7500U, GT-i8260, GT-i8260E, GT-i8260L, GT-i8262, GT-i8262B, GT-i8520, GT-i8550, GT-i8550E, GT-i8550L, GT-i8552, GT-i8552B, Galaxy, Galaxy 3, Galaxy 5, Galaxy 550, Galaxy 551, Galaxy 580, Galaxy Ace, Galaxy Ace II x, Galaxy Ace Plus, Galaxy Ace Q, Galaxy Apollo, Galaxy Appeal, Galaxy Cooper, Galaxy Core, Galaxy Core Duos, Galaxy Discover, Galaxy Europa, Galaxy Europe, Galaxy Fit, Galaxy Gio, Galaxy Grand Quattro, Galaxy Icon, Galaxy Leo, Galaxy Lite, Galaxy Mini, Galaxy Mini (SGH-T499), Galaxy Mini 2, Galaxy Mini 2 NFC, Galaxy Mini Pro, Galaxy Naos, Galaxy Next, Galaxy Pop, Galaxy Portal, Galaxy Pro, Galaxy Q, Galaxy S Duos, Galaxy S III Duos, Galaxy Spica, Galaxy Teos, Galaxy Trend, Galaxy Trend Dual, Galaxy Trend II, Galaxy Trend II Duos, Galaxy Win, Galaxy Win Duos, Galaxy Young, Galaxy Young Duos, Galaxy Young Duos TV, Galaxy Young NFC, Galaxy i5500, Galaxy i5510, Galaxy i5510L, Galaxy i5510M, Galaxy i5510T, Galaxy i5700, Galaxy i5700L, Galaxy i5700R, Galaxy i7500, Galaxy i7500L, Galaxy i7500U, Gravity Smart, S730M, S5570, S5570B, S5570L, S5660, S5660B, S5660L, S5660M, S5660V, S5670, S5670B, S5670L, S5830, S5830B, S5830D, S5830L, S5830T, S6310, S6310L, S6310N, S6310T, S6312, S6313T, S6500, S6500D, S6500L, S6500T, S7500, S7500L, S7500T, S7500W, S7560, S7560M, S7562, S7562L, S7570, S7572, SGH-B7510, SGH-B7510B, SGH-B7510L, SGH-S730M, SGH-S5570, SGH-S5570B, SGH-S5570L, SGH-S5660, SGH-S5660B, SGH-S5660L, SGH-S5660M, SGH-S5660V, SGH-S5670, SGH-S5670B, SGH-S5670L, SGH-S5830, SGH-S5830B, SGH-S5830D, SGH-S5830L, SGH-S5830T, SGH-S6310, SGH-S6310L, SGH-S6310N, SGH-S6310T, SGH-S6312, SGH-S6313T, SGH-S6500, SGH-S6500D, SGH-S6500L, SGH-S6500T, SGH-S7500, SGH-S7500L, SGH-S7500T, SGH-S7500W, SGH-S7560, SGH-S7560M, SGH-S7562, SGH-S7562L, SGH-S7570, SGH-S7572, SGH-T499, SGH-T499V, SGH-T499Y, SGH-T589, SGH-T589R, SGH-T589W, SGH-T939, SGH-i827, SGH-i827D, SGH-i857, SGH-i5500, SGH-i5500B, SGH-i5500L, SGH-i5500M, SGH-i5503, SGH-i5503T, SGH-i5508, SGH-i5510, SGH-i5510L, SGH-i5510M, SGH-i5510T, SGH-i5700, SGH-i5700L, SGH-i5700R, SGH-i5800, SGH-i5800D, SGH-i5800L, SGH-i5801, SGH-i7500, SGH-i7500L, SGH-i7500U, SGH-i8260, SGH-i8260E, SGH-i8260L, SGH-i8262, SGH-i8262B, SGH-i8520, SGH-i8550, SGH-i8550E, SGH-i8550L, SGH-i8552, SGH-i8552B, SM-G3819, Spica, T499, T499V, T499Y, T589, T589 Gravity Smart, T589R, T589W, T939, T939 Behold 2, i827, i827D, i857, i5500, i5500B, i5500L, i5500M, i5503, i5503T, i5508, i5510, i5510L, i5510M, i5510T, i5700, i5700 Galaxy, i5700 Galaxy Icon, i5700 Galaxy Lite, i5700 Galaxy Portal, i5700 Galaxy Spica, i5700 Spica, i5700L, i5700L Galaxy, i5700L Galaxy Lite, i5700L Spica, i5700R, i5800, i5800D, i5800L, i5801, i7500, i7500 Galaxy, i7500 Galaxy Icon, i7500L, i7500L Galaxy, i7500U, i7500U Galaxy, i8260, i8260E, i8260L, i8262, i8262B, i8520, i8520 Beam, i8550, i8550E, i8550L, i8552, i8552B

Make sure your phone is network locked

  • This unlocking service will only work to remove network operator and related locks (Network Lock, Network Subset Lock, SP lock, CP lock) that lock the phone to a specific network or service provider.
  • This service will not deactivate the phone’s other security features or solve other problems your phone may have.
  • The easiest way to check if your phone is network locked is to power off the phone, insert an unsupported SIM card, and power on the phone.
  • If the screen reads
    SIM network unlock PIN
    Enter Network Lock Control Key
    Netzentsperr-PIN für SIM
    PIN de desbloqueo de red de SIM
    Code de déverrouillage réseau
    PIN di sblocco rete SIM
    PIN de desbloqueio de rede SIM
    Inserir código de controle de bloqueio de rede
    Introducir clave de control de bloqueo de red
    then your phone is network locked and you can unlock it by USB.
  • If you see only Network lock and a Dismiss button, with no box to enter an unlock code, this means your phone is hard locked and cannot be unlocked. (this mostly happens on phones from Claro Puerto Rico and Telcel Mexico). See images below for help identifying hard locked phones.
Supported Locked Samsung

Supported Locked Samsung

Unsupported Hardlocked Samsung

Unsupported Hardlocked Samsung

What do I need to unlock my phone?

Apart from the network locked Samsung phone, you will need:

  • Windows XP/Vista/7 computer with internet connection
  • USB cable

How do I purchase an unlocking service on FastGSM?

  • Go to the detail page for your phone on
  • Select a service.
  • Click Buy Now and follow the instructions. You will be asked to create an account or sign into your existing account.

Install the device driver

  • Close all applications.
  • Download and install Drivers for Samsung.

Enable USB debugging

Change phone mode

For i7500L:

  • Dial *#9090# on the Phone Keypad and select UART_NULL USB_Diag

For all other models:

  • Go to the Phone Keypad and dial *#7284#
  • If you see the ServiceMode menu, select USB.
  • If you see the PhoneUtil menu, select MODEM under the USB section.

Now restart your phone and wait until it fully starts up.

Download and start FastGSM Samsung Client software

  • Download FastGSM Samsung Unlock Client software and save it to your Desktop or Downloads folder.
  • Once download is completed, run the client software.
  • Click Install. The software will start automatically.
  • When prompted for your login and password, fill in your FastGSM account email and password.
  • Select your phone model and press Next. You can find your phone model on the box or on the sticker under the battery (e.g. for GT-A123 or SGH-A123 select A123 model).

Connect the phone and complete the unlocking process

  • Connect the phone to your computer using the USB cable.
  • Wait until drivers are successfully installed.
  • Unplug the phone from the USB cable. Wait 10 seconds, then reconnect the phone to the USB cable.
  • Press the Next button in the FastGSM Samsung Client.
  • Wait until unlocking is complete.

Disable USB debugging

Change phone mode back

For i7500L:

  • Dial *#9090# on the Phone Keypad and select UART_Diag USB_NULL

For all other models:

  • Go to the Phone Keypad and dial *#7284#
  • If you see the ServiceMode menu, select UART.
  • If you see the PhoneUtil menu, select PDA under the USB section.

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