✅ Method 1: ADB Commands (Rooted Phones ke liye Best)

1. Phone me USB Debugging enable karein: Settings → Developer Options → Enable USB Debugging.
2. PC me ADB drivers aur platform tools install karein.
3. Phone ko PC se connect karein aur Command Prompt (CMD) open karein.
4. Niche di gayi commands run karein:

   adb shell
   su
   setprop sys.usb.config diag,adb
               

5. ✅ Agar command successfully execute ho jaye, to phone DIAG Mode me chala jayega.
   ➡ Device Manager me “Qualcomm HS-USB Diagnostics” (COM Port) show hoga.

✅ Method 2: Secret Code Se Enable Karna (Non-Rooted Phones)

1. Phone dialer open karein aur secret code enter karein.
2. Common Secret Codes:
   • Samsung Qualcomm Devices: *#0808# → DM + ACM + ADB Select karein → Reboot
   • Xiaomi Qualcomm Phones: *#9090# → DIAG Mode Select karein → Reboot
   • Oppo / Vivo Qualcomm Phones: *#8011# → USB DIAG Mode ON karein
3. Phone restart karein aur Device Manager me port check karein.
4. ✅ Agar “Qualcomm HS-USB Diagnostics” (COM Port) show ho raha hai, to DIAG Mode enable ho gaya.

✅ Method 3: QPST Tool Se Enable Karna (EDL Mode Required)

1. Phone ko EDL Mode (9008) me boot karein: (Volume Up + Volume Down + USB Connect).
2. PC me QPST Tool install karein aur open karein.
3. QPST Configuration → Ports → Add Port karein.
4. “Qualcomm HS-USB QDLoader 9008” select karein.
5. Software Download / RF NV Manager se DIAG mode enable karein.
6. ✅ Agar successful ho jaye, to phone Diagnostic Mode me enter ho jayega.

✅ Method 4: Code Aurora Tweak (Root Required)

1. Root Explorer ya Terminal Emulator install karein.
2. Command execute karein: echo 1 > /sys/devices/virtual/android_usb/android0/f_diag_enable
3. ✅ Phone DIAG Mode me chala jayega.

1. Device Manager Open karein: Windows + R → devmgmt.msc → Enter
2. Ports (COM & LPT) Section Check karein: Agar “Qualcomm HS-USB Diagnostics (COM X)” show ho raha hai, to DIAG Mode enable hai. Agar nahi, to method dobara try karein.

1. QPST Tool Download aur Install karein.
2. Phone ko DIAG Mode me connect karein aur QPST open karein.
3. Software Download Section open karein.
4. “Backup NV Data” option select karein aur backup save karein.
5. IMEI Repair Tool open karein aur new IMEI enter karein.
6. “Write” button click karein aur process complete hone ka wait karein.
7. ✅ Agar process complete ho jaye, to phone restart karein aur IMEI check karein.

1. QPST Software Open karein.
2. Service Programming → “Read From Phone” option select karein.
3. Phone ki QCN File save karein.
4. Agar network issue ho, to saved QCN File ko restore karein.
5. ✅ Process complete hone par phone restart karein aur network check karein.

1. USB Debugging Ensure karein: Developer Options me USB Debugging aur OEM Unlocking enable ho.
2. Different Codes Try karein: Har model ke liye different secret codes ho sakte hain.
3. Drivers Reinstall karein: Qualcomm QDLoader 9008 USB Drivers install karein.
4. QPST Tool try karein: Agar phone hard locked ho, to EDL Mode se QPST use karein.
5. Root + Terminal Method try karein: Agar phone rooted hai, to manual DIAG enable karein.

• Qualcomm Diag Mode ka istemal IMEI Repair, QCN Backup/Restore, SIM Unlock, aur Network Unlock ke liye hota hai.
• ADB Command Method (Rooted Phones ke liye Best) is highly recommended.
• Secret Codes Method (Non-Rooted Phones me work kar sakta hai) may also be used.
• QPST/QFIL EDL Mode (Jab phone boot dead ho ya USB Debugging off ho) is a fallback method.

1. Q1: Qualcomm Diag Mode ka primary purpose kya hai?
   A: NV memory tak access dena jisse IMEI repair, SIM/Network unlock, aur NV backup possible hota hai.
2. Q2: ADB Command method se Diag Mode enable karne ke liye kaunsi command run hoti hai?
   A: setprop sys.usb.config diag,adb
3. Q3: Secret Code method mein, Xiaomi devices ka code kya hai?
   A: *#9090#
4. Q4: QPST Tool se Diag Mode enable karne ke liye phone ko kis mode mein boot karna parta hai?
   A: EDL Mode
5. Q5: Device Manager me “Qualcomm HS-USB Diagnostics” nazar aane ka matlab kya hai?
   A: Diag Mode successfully enable ho chuka hai.

1. Q1: Diag Mode ke liye, ______ Debugging enable karna zaroori hai.
   Jawab: USB
2. Q2: Secret Code method mein, Xiaomi devices ka code ______ hai.
   Jawab: *#9090#
3. Q3: QPST Tool method require karta hai ke phone ko ______ mode mein boot kiya jaye.
   Jawab: EDL
4. Q4: ADB Command method mein command ______ run hoti hai.
   Jawab: setprop sys.usb.config diag,adb
5. Q5: Diag Mode enable hone se phone ki ______ memory tak access hota hai.
   Jawab: NV

1. Q1: Explain the primary purpose of Qualcomm Diag Mode.
   A: It allows access to the NV memory for critical tasks like IMEI repair, SIM/Network unlock, and NV backup.
2. Q2: How does the ADB Command method enable Diag Mode?
   A: By enabling USB Debugging and executing commands that set the USB configuration to diag,adb.
3. Q3: What advantage do secret dialer codes offer in Diag Mode activation?
   A: They allow non-rooted devices to quickly enable Diag Mode without using ADB commands.
4. Q4: Describe the role of the QPST Tool in Diag Mode activation.
   A: It enables Diag Mode via EDL mode, especially when USB Debugging is off or the phone is hard locked.
5. Q5: How can you verify that Diag Mode is active on a device?
   A: By checking Device Manager for “Qualcomm HS-USB Diagnostics” under the Ports section.

1. T/F 1: Qualcomm Diag Mode is used exclusively for IMEI repair.
   Jawab: False
2. T/F 2: USB Debugging must be enabled for the ADB Command method.
   Jawab: True
3. T/F 3: Secret dialer codes work on every Qualcomm device.
   Jawab: False
4. T/F 4: Code Aurora Tweak method requires the phone to be rooted.
   Jawab: True
5. T/F 5: Reinstalling Qualcomm USB drivers can help if Diag Mode fails to enable.
   Jawab: True