Hey everyone, Today , Just got a LG G3 D850 and try to factory reset after all done, the device is asking for a McAfee PIN .. So i will fixed with octoplus box tool. i show now. make sure that battery is fully charged, try to deactivate Kill Switch and put the phone into Emergency (Download ) mode manually and reflash the phone with : lgd850at-01-v10f-310-410-oct-15-2014+0.oct Flash File.. Checking data...OK Platform: LG Qualcomm Selected port: COM67 Selected model: D850 To deactivate Kill Switch do the next: 1. Attach testpoint as shown on Figure in manual, and connect phone with Micro USB cable. 2. Check PC Device Manager, a new device should appear "Qualcomm HS- USB QDLoader 9008". 3. Release testpoint.OK Sending loader...OK Connecting to server ...OK Initializing device...OK Deactivating Kill Switch...OK Please, reconnect the battery, put the phone in download mode manually and re-flash the phone.