UPGRADE DOWNLOAD TOOL ERRORS N SOLUTIONS

Phone is totally dead

The phone doesnt respond to power button or only vibrates after pressing the power button but doesnt come on
Cause: The OS is either corrupted or there's no power to boot the phone

Solution: Ensure the battery is well charged.Re-flash the pac file

Research / Upgrade download tool does not show waiting.... instead, the phone just charges

After you click Start and connect the phone to the PC, the tool doesn't show waiting. Instead, the phone begins charging or shows a charging sign. You could sometimes get the USB connection-disconnection sound on the PC
Cause: The Spreadtrum drivers have not been properly associated with the device

Solution: Reinstall Spreadtrum drivers.

Progress bar stuck at waiting....

After clicking Start Downloading and connecting the phone, the Progress bar gets stuck at Waiting...

Cause: The tools is having problems finding the phone

Solution: Ensure the phone is switched off with a charged battery inside before connecting to PC for flashing. Ensure to install Spreadtrum drivers before flashing. Try using a different USB cord, PC port or PC. Try holding the volume +/- button while connecting to PC for flashing.

Failed:NV data read in phone is crashed

Cause: The NV items (Calibration) are causing a clash

Solution: On UpgradeDownload tool, after loading the pac file, click the Settings Icon.Navigate to the Calibration tab.Untick all items then click OK.Proceed with flashing

USB device not recognized

USB device not recognized prompt at system tray after connecting  the phone to PC

Cause: The PC is having problems communicating with the phone (often due to interruption, hardware or driver problems)

Solution: Try a different USB cord, PC port or PC. Re-install Spreadtrum drivers. Ensure the phone is switched off before connecting to PC for flashin.

Failed: Operation failed/Failed: download size error

Failed: Operation failed error during flashing

Cause: An error was encountered during flashing

Solution: Flash one file at a time (fdl 1 & 2 are required so the third will be selected one at a time from the remaining files). Ensure the flashing process isn't interrupted by a shaky USB cord / Port. Try using a higher version of Research Download tool. Try a different pac file.

Downloading failed : wait input time out / remote data too large

Cause: A timeout was reached as a result of the flashing process taking too long

Solution: Use the latest version of Research Download tool or Upgrade Download too. 

Failed incompatible partition

Cause: There was an error flashing to certain partitions

Solution: Use the latest version of Research Download tool or Upgrade Download tool. Flash one item at a time (fdl 1&2 most be selected)

Stuck at checking Bautrate

Cause: The tool encountered an error initializing flashing

Solution: Disconnect the phone from the PC, take out the battery and slot back in. Close Research Download / Upgrade download tool and relaunch
 

Failed: buffer error

Failed:decode or verify received buffer error

Cause: The tool encountered a problem flashing the pac file.

Solution: Use the latest version of Research Download or Upgrade.


Credit to Hovatek for most of this work......