Unlocking the Samsung Captivate and other Galaxy S devices is very easy with the help of “Galaxy_S Unlock Tool from the Android Market. Not only does it SIM Unlock your Android phone but it does it for free. Follow along witht the instructions above in the video or use the SIM unlock instructions below.
SIM Unlock Instructions for Samsung Galaxy S Devices:
Go the Android Market and Install “Galaxy_S Unlock”
Open the Galaxy_S Unlock” App and Allow Root Access
Select Step1 and allow it to backup efs
Select Step2 and allow (this takes about 30 seconds)
Your phone will reboot
Once booted open “Galasy_S Unlock” and select step3
Congrats your SIM is unlocked!
You can now place your T-Mobile SIM into the captivate and go nuts. The device will still allow the AT&T SIM just fine. If you run into any issues the Galaxy_S Unlock app will allow you to revert back so that you can relock it back to the way it was originally.
While this method is meant for the Samsung Captivate it can also be used for all Galaxy S devices like the Vibrant and Fascinate. The Captivate is an older Android phone but still very popular. The Samsung Captivate is an AT&T phone but also easily SIM unlocked to work on other carriers like T-Mobile. The first step is to root the device and here it is.
Put you Captivate in USB Debugging Mode (Settings -> Applications -> Development)
Plug your Captivate into your PC via USB
Open SuperOneClick (wherever you just extracted it)
Click the “Root” button
When asking if you want BusyBox say Yes
When completed unplug your Phone and Reboot it
Congrats you now have root access on your Captivate!
If you want to test your Super User rights download Titanium Backup or any other app that requires root access and open it. You should get a superuser access window to accept and your good to go. As always follow these instructions at your own risk we are not responsible for its use.
Those of you that need to flash back to the Samsung Vibrant stock ROM can do so with the following directions. This works on phones that are updated to Froyo and need to be flashed back to gain root access as well as those who have bricked their Vibrant by messing around.
You will need drivers installed on the computer that you use to flash your Samsung Vibrant back to the stock rom.
You can get these drivers here: 32-bit Driver | 64-bit Driver
Instructions to flash Vibrant back to Stock:
Get your phone into Download mode by holding volume down and power.
Don’t check anything else, “Auto Reboot” and “Reset Time” should be checked by default
Connect your phone to the Computer via USB
Hit “start”! be patient!
If you don’t see a progress bar after hitting start (after a minute) start over at step one.
Having Trouble with Download Mode:
If you are stuck on the PC and phone screen just hold both volume buttons and power at the same time. let the Vibrants screen come on and go back off and on the second time before the Vibrant comes back on let go of the power button while still holding the volume buttons. This should get you back to download mode.