I forgot my password for samsung behold

It is the last 4 digits of your phone number.

Why don´t you contact with your service provider and ask them?

take it to t mobile, or call them and they will give you a new password

call tmobile and they will give you a new password

Reflashing the firmware on your phone will get rid of the password. Here is a link to a guide. I just did it on a phone I found and the phone is factory fresh with no password.

http://www.youmobile.org/samsung-behold/index.php?topic=4197.0

call tmobile for new password

you have 3 options
1. go to t-mobile store they will send your behold to the manufacturer and then 'll send u back new one
2. go to cellphone repair shop they will unlock for ~30 bucks
3. buy software on ebay and unlock by yourself

remove sim card and power on , on insert sim screen enter *#2767*2878# that wll reset your settings if that doesn't work enter *#2767*3855# but this will CLEAR YOUR DEVICE the only thing that wont be erased is your contacts if they're on the sim.

Dont worry. If you forgot your password for your samsung behold tmobile it is eassy to reset. just follow these steps :
Step 1: Turn your phone off Step 2: press and hold down volume and hold call button and End button if done right you will see a Reset mode pop on your display screen step 3: This picture with icon over a phone pops just Press "MENU" and wait for your phone to boot and then enjoy.

If you can enter *2767*3855# without the simcard then that's the way to unlock and reset it but it will delete all information stored on the phone. Unfortunately, if you won't be able to enter the strings of command completely, then there's no other way to unlock it but to send the phone for repair to Samsung service center.