If the device asks for a Google account after flashing, you are facing the FRP lock.
Some users bypass this by navigating through "TalkBack" settings or "Help & Feedback" menus to access a web browser and ultimately the system settings to perform another reset.
Removing a screen lock or Google Factory Reset Protection (FRP) on the Sony Xperia Z5 Premium Dual (E6833) e6833 lock remove ftf hot
Open Flashtool and use the integrated XperiaFirm icon to download the correct firmware for the E6833 model.
These ensure your PC recognizes the phone in Flash Mode . If the device asks for a Google account
The primary community-standard utility for flashing FTF files to Xperia devices. FTF Firmware File: You must download the specific firmware for the
Flashing a "hot" (ready-to-use) FTF file is the most reliable way to clear a forgotten lock when you cannot access the settings menu. These ensure your PC recognizes the phone in Flash Mode
To perform an "E6833 lock remove," you need specific software and hardware:
A high-quality micro-USB cable is required for a stable connection. How to Remove the Lock Using FTF Files
If you still have access to the Google account, you can use Google Find My Device to remotely wipe the phone, which sometimes resolves credential loops.