Enter Diag Mode Spd [ VALIDATED ]

If the phone is powered on and you can access the dialer, you may be able to toggle Diag Mode via the Engineer Menu. Open the app. Try the following codes: *#*#83781#*#* *#*#9646633#*#* Navigate to the Telephony or Connectivity tab. Look for "USB Setup" or "Port Settings."

Connect the phone powered off while holding the boot key (usually Volume Down). enter diag mode spd

Try a different USB port (preferably USB 2.0) or a different cable. Some modern USB 3.0/3.1 ports have timing issues with older SPD bootloaders. Conclusion If the phone is powered on and you