SPD (Spreadtrum) chipset wale mobile phones mein NV file ek Non-Volatile memory file hoti hai jo device ki important settings aur data store karti hai.

1. IMEI Data Storage: Phone ka IMEI number NV file mein store hota hai. Agar yeh file corrupt ho jaye to IMEI null ho sakta hai.
2. Network Configuration: NV file ke andar network settings hoti hain, jo device ke SIM network, signal strength aur APN settings ko control karti hain.
3. Baseband Information: Agar NV file missing ho to phone ka baseband unknown ho sakta hai, jis se mobile signals ka masla ho sakta hai.
4. WiFi aur Bluetooth Address: NV file ke andar WiFi MAC address aur Bluetooth address bhi store hote hain. Agar yeh file delete ho jaye to WiFi aur Bluetooth properly kaam nahi karte.
5. FRP aur Security Data: Google FRP lock ka data bhi is file mein hota hai, jo phone ko unauthorized flashing se bachata hai.

• IMEI 0 ho jata hai ya missing ho sakta hai.
• No Service, Emergency Calls Only ka masla aa sakta hai.
• WiFi aur Bluetooth kaam karna band kar sakte hain.
• Baseband unknown error aa sakti hai.
• Phone ka FRP lock remove karna mushkil ho sakta hai.

1. Method 1: Miracle Box Se Backup
   1. Miracle Box tool open karein.
   2. SPD chipset select karein.
   3. Read NV option select karein.
   4. Start button dabayein aur backup save karein.
2. Method 2: Unlock Tool Ya CM2 Se Backup
   1. Unlock Tool ya CM2 Tool open karein.
   2. SPD module select karein.
   3. Read NV option par click karein.
   4. File ko safe jaga par save karein.
3. Method 3: ADB Commands Se Backup (Rooted Devices Ke Liye)
   1. ADB & Fastboot drivers install karein.
   2. Phone ko USB Debugging mode mein connect karein.
   3. Command prompt open karein aur neeche di gayi command likhein:
      

      adb shell
      su
      dd if=/dev/block/by-name/nvram of=/sdcard/nvram.img
                      

   4. NV file SD card mein save ho jayegi.

Agar aap SPD phone flash kar rahe hain, to NV file ka backup lazmi karein, warna IMEI loss ho sakta hai aur phone no service ya unknown baseband error de sakta hai. Backup ki madad se aap easily IMEI repair aur network restore kar sakte hain.

1. Q1: SPD NV file kis cheez ko store karti hai?
   A: Device ki important settings aur data, jisme IMEI, network configuration, baseband, WiFi/Bluetooth address aur FRP lock data shamil hain.
2. Q2: Agar NV file corrupt ho jaye to IMEI number ka kya nateeja ho sakta hai?
   A: IMEI number null ho sakta hai ya missing ho sakta hai.
3. Q3: NV file mein network configuration ka kya role hai?
   A: SIM network, signal strength aur APN settings ko control karna.
4. Q4: ADB commands se NV file backup lene ke liye kaun sa command istemal hota hai?
   A: adb shell su dd if=/dev/block/by-name/nvram of=/sdcard/nvram.img
5. Q5: NV file backup kyun zaroori hai jab phone flash kiya jata hai?
   A: Backup se IMEI repair aur network restore asaan ho jati hai, aur no service ya unknown baseband error se bachav hota hai.

1. Q1: SPD NV file ek ______ memory file hoti hai.
   Jawab: Non-Volatile
2. Q2: NV file ke andar device ka ______ number store hota hai.
   Jawab: IMEI
3. Q3: NV file agar corrupt ho jaye to phone mein ______ error aa sakta hai.
   Jawab: no service
4. Q4: WiFi aur Bluetooth addresses bhi NV file ke ______ store hote hain.
   Jawab: andar
5. Q5: ADB command se NV file backup SD card mein ______ jati hai.
   Jawab: save

1. Q1: NV file phone ke kaunse important data store karti hai?
   A: NV file mein IMEI number, network configuration, baseband information, WiFi/Bluetooth addresses aur FRP lock data store hota hai.
2. Q2: NV file corrupt hone se phone par kaun se issues aasakte hain?
   A: IMEI loss, no service, WiFi/Bluetooth malfunction, aur unknown baseband error.
3. Q3: Miracle Box se NV file backup lene ka process kya hai?
   A: Miracle Box tool open karna, SPD chipset select karna, Read NV option choose karna aur backup save karna.
4. Q4: ADB command ka istemal karke NV file ka backup kaise liya jata hai?
   A: Phone ko USB Debugging mode mein connect karke command prompt se adb shell su dd if=/dev/block/by-name/nvram of=/sdcard/nvram.img run kiya jata hai.
5. Q5: NV file backup karke flashing process ke dauran kya faida hota hai?
   A: Backup se IMEI repair aur network restore asaan ho jata hai aur device errors se bachav hota hai.

1. T/F 1: NV file sirf IMEI number hi store karti hai.
   Jawab: False
2. T/F 2: Agar NV file corrupt ho jaye to phone mein no service ka issue aasakta hai.
   Jawab: True
3. T/F 3: WiFi aur Bluetooth addresses NV file ke andar store hote hain.
   Jawab: True
4. T/F 4: ADB command se NV file backup lene mein zyada time lagta hai.
   Jawab: False
5. T/F 5: NV file backup se flashing process ke dauran IMEI repair asaan ho jata hai.
   Jawab: True