How to Set Password on Samsung Galaxy S2 I9100 One of the common and effective methods to protect the Samsung Galaxy S2 I9100 phone is to set a password to lock its screen, which can be realized by the detailed steps illustrated in this article. Steps to set password on Samsung Galaxy S2 I9100 are as follows: Step 1: Press the bottom-left Menu Key and select Settings to access it. Step 2: Choose Security to move on. Step 3: Click Set screen lock . Step 4: Select Password . Step 5: Enter a password with at least 4 characters (including at least 1 letter) and tap Continue when finished. Step 6: Re-enter the password and choose OK . Related Articles : How to Set Password on Samsung Galaxy S3 I9300/I9308 How to Set Password on Galaxy S4 GT-I9500/GT-I9508 How to Set Password on Samsung GT-I8190N How to Set Password on Samsung GT-I8268 How to Open USB Debugging in Samsung Galaxy S5 download file now