Turn Off phone, hold Vol UP + Vol DOWN and insert USB cable.
Some phones may need Special Boot Cable or TestPoint for EDL mode.
Found Port : Qualcomm HS-USB QDLoader 9008 (COM135)
Driver Info : HS Corporation, ghsser.sys, 10.2104.1.2
Connecting to phone...OK
Waiting for response...OK
Init Handshake Sequence...OK
Hardware ID : E1F00500 [8996] B93D702A
OPK_DATA : 904DA9E6B158B218AA3E8F634004F5F11EB85C01FBA4D18DF92A2AFEB346E345
Initializing Protocol...OK
Using Auto Loader Selection [1]
Preparing Loader...Done
Sending Loader [8996_008]...Done
Executing Loader...OK
Detecting Chip Type...OK
Hardware : MSM8996, UFS, 64 GB
LU Count : 6 [0x00D7D800] [0x00000400] [0x00000400] [0x00008000] [0x00100000] [0x00060000]
Payload Info : In: 262144 [4096], Out: 131072, Sector Size: 4096
Reading Partition Table...OK
Reading Device Information...OK
Device : OnePlus [msm8996] [OnePlus3T]
Software : , 1809150114 [Sat Sep 15 02:02:12 CST 2018]
Android Ver. : 8.0.0
Patch Level : 2018-09-01
Formatting userdata [SafeMode]...Done
Resetting FRP Lock.......Done
Operation Finished.