How to Set Password on Samsung Galaxy S GT I9000 To lock your Samsung Galaxy S GT-I9000 phone screen with a password, you can adopt the following steps. Step 1: Open Settings . Step 2: Access Location and security . Step 3: Choose Set screen lock . Step 4: Select Password . Step 5: Enter a password containing at least 4 characters and tap Continue . BTW, the password can consist of numbers, symbols and letters. Moreover, it must contain at least 1 letter. Step 6: Re-enter the password and click OK . Reference Articles : Android USB Driver for Samsung How to Set Password on Samsung Galaxy S3 I9300/I9308 How to Set Password on Galaxy S4 GT-I9500/GT-I9508 How to Open USB Debugging in Samsung Galaxy S5 download file now