Perform a hard reset via recovery if accessible. Risk: This process wipes all user data. Steps to Remove Lock Screen Using FTF:
How to Remove Screen Lock on Sony Xperia Z Ultra C6802 Using FTF If you are locked out of your Sony Xperia Z Ultra C6802 sony c6802 lock remove ftf
The search query "Sony C6802 lock remove ftf" refers to a procedure used to bypass security locks (Screen lock or FRP) on the Sony Xperia Z Ultra by flashing a specific firmware file using the program. This method was highly prevalent on older Sony devices running Android versions prior to Oreo. It involves using a modified stock firmware file ( .ftf ) that wipes the userdata partition or bypasses the verification process. Perform a hard reset via recovery if accessible
Sony recommends using official tools for security-related issues, as third-party files can carry risks: Xperia Companion This method was highly prevalent on older Sony