It sounds like you're looking for a way to remove a screen lock (pattern, PIN, password, or fingerprint) from a Sony Xperia XA1 Ultra (model number G3311) using an FTF firmware file.

Here's a useful feature regarding this process:

Part 2: Requirements Before You Begin

Flashing an FTF is a technical procedure. If done incorrectly, you could brick your Sony G3311. Prepare the following:

Part 1: Understanding the Sony G3311 and FTF Files

Step 1: Install Flashtool and Drivers

1. Download and install Flashtool to C:\Flashtool.
2. Navigate to C:\Flashtool\drivers and run Flashtool-drivers.exe.
3. In the driver installer, check:
   • Flashmode Drivers
   • Fastboot Drivers
   • Xperia XZ1 / XZ Premium / XA1 / XA1 Plus / XA1 Ultra (Select this – it covers G3311)
   • Xperia Z5 family (for legacy support)
4. Click "Install" and allow any Windows security prompts.