These are instructions on how to use the Pandora Tool to calibrate the RF Parameters of your Spreadtrum/UniSoc smartphones and tablets.

Requirements: You need to have a Physical Spreadtrum/UniSoc Smartphone or Tablet to Follow the Following Tutorial. If Spreadtrum/UniSoc Chipset does not power your device, this tutorial will not work for you.

Use Pandora Tool

  1. Download and Install Spreadtrum USB Driver on your Computer (if in case Spreadtrum Driver is already installed, then SKIP this Step).
  2. USB Logo

  3. Download and Extract Pandora Tool on your Computer. After Extracting the Pandora Tool, you will be able to see the following files:
  4. Pandora Tool Files

  5. Now, Open Pandora.exe to Launch it.
  6. Launch Pandora Tool

  7. Once Pandora Tool is launched, you will be able to see a similar screen:
  8. pandora tool launched

  9. In Pandora Tool there are Three Main Areas: Connecting Region, Main Function Region, Log Area.
  10. pandora tool area

  11. Now, Click on the device Button to configure the meter and power supply of your Spreadtrum device.
  12. pandora tool configure

    Once you are done with the configuration, Click on the OK button to close the Dialog Area.

    pandora tool configure done

  13. Now, you need to Configure the Standard to connect the device to the Computer. You need to select the Device GSM Type (whether it is GSM, TD-SCDMA, WCDMA, LTE, BBAT), then you need to select the Mode: Cal Mode or Cal Post Mode.
  14. Cal Mode is also known as non-signaling mode which helps in calibration and non-signaling FT.

    Cal Post Mode is known as Mode Signaling, which helps calibrate Signaling comprising the FT.

    pandora tool connect area

  15. Once you have selected the Mode, Select the Connection Type as USB or COM1 or COM2. Then click on the Connect button to connect your Spreadtrum/UniSoc Device to the computer (during this process, you need to physically connect your device to the computer with the USB cable, and your device must be in Download Mode (Volume Down + Power Button) to get it detected by the tool).
  16. pandora tool connect

  17. Once your device is connected to the computer successfully, Click on the AT Button to send Command to the Spreadtrum/UniSoc Device.
  18. pandora tool at dialog

  19. Once AT Command Dialog box is launched, select the Request Type from the Drop Down Menu and Click on the Send Button. After Clicking on the Send button, Response from your Spreadtrum/UniSoc device will be displayed in the Responded Area.
  20. pandora tool at command send

  21. Now, Under the Common > CP Tab, you will be able to see the Write Options. The Write Options allows you to Write or Read the IMEI, BlueTooth, WiFI Address on your Spreadtrum/UniSoc Device.
  22. pandora tool write options

  23. Now, Enter the IMEI in the IMEI1 or IMEI2 Area (as per the availability of the SIM card slots on your Spreadtrum/UniSoc Device). Then click on the Write Button to Write the IMEI on your device. You can do the Same Step for writing the BlueTooth and WiFI Address.
  24. pandora tool imei write

  25. Additionally, Pandora Tool also allows you to determine the RF Path. To test whether the TX RX Path is functioning normally, select your device type, whether it is a GSM, TD-SCDMA, WCDMA, or LTE. In our case, we have selected WCDMA as an example:
  26. pandora tool wcdma activate

    After Selecting the WCDMA as example, you have to click on the Activate button.

  27. Now, Click on the Max Power Button. It will display the maximum power of your device in the Log Area.
  28. pandora tool wcdma max power

  29. Now, using the Cell Power Option you can adjust the power of your device.
  30. pandora tool wcdma cell power

    That’s all. Pandora Tool also comes with additional features including Reading Calibration Flag, Read Production Info, Read Voltage, Factor Reset, Power Off the device, Reboot the Device, Enter the Sleep Mode, and Read the UID.


      [*] Pandora Tool can be used for conventional operation of the mobile phone, comprising GSM, TD-SCDMA, WCDMA, LTE, WIFI, BT, FM radio and reading various debug serial number, ADC reading and writing.

      [*] Caution: Writing the IMEI or Adjusting the Cell Power can cause personal data loss. Therefore, we recommend you take a backup of your personal data before using the Tool.

      [*] IMEI Write: Spreadtrum/UniSoc Inc also released the official Write IMEI Tool, which allows you to Read and Write IMEI on your Spreadtrum/UniSoc Devices quickly. You can Download the Write IMEI Tool from here.

      [*] Credits: Pandora Tool is created and distributed by Spreadtrum/Unisoc Inc. So, full credit goes to them for sharing the tool for free.