: Press and hold the Left and Right buttons located directly beneath the display.
If the phone is "soft-bricked" or the button combinations aren't working, you can use the Xperia Companion (formerly PC Companion) on a Windows computer. How Do I Factory Reset with PC Companion? - Community sony ericsson mt11i hard reset
Choose and confirm by tapping Reset customization and reboot . The phone will restart and begin the formatting process. Method 3: Reset Using Sony PC Companion (Official Tool) : Press and hold the Left and Right
If you can still access the dialer, you can trigger a deep system reset using a service code. Open the app and access the keypad. Enter the following code: *#*#7378423#*#* . A Service Menu will appear. Select Customization Settings . sony ericsson mt11i hard reset
