The LG V30 has anti-theft and may affect how you are able to master reset the device.
To turn off anti-theft protection, follow these steps:
- Sign out of any Gmail accounts assigned to the device.
- From any home screen, tap Apps > Settings.
- If using Tab view, select the General tab.
- Tap Accounts & sync > Google.
- Tap the email account assigned to the device.
- Tap Menu > Remove account > REMOVE ACCOUNT.