Flash/unbrick or upgrade your device with the firmwares below using odin
Learn how to use odin from here
Samsung Galaxy S2 SPH D710 SPRINT Stock Firmware
D710USFI27_D710USFI27
D710USFL24_D710USFL24
D710USGB27_D710USGB27
D710USFI27_D710USFI27
D710USFL24_D710USFL24
D710USGB27_D710USGB27
For other Samsung firmwares, click here
To flash or upgrade your Galaxy SPH-D710 with any of this firmware,
- Download and install samsung drivers
- Download and launch odin
- Turn off your phone
- Boot phone into download mode by holding vol down + home + power button
- When you see the yellow triangle, press volume up to continue into odin mode
- Now connect the phone to PC using USB cord
- Wait for odin to detect the phone (you will see the COM Port)
- Now click AP in odin interface then select the firmware
- After the firmware is successfully loaded,
- Click Start button
- Wait for process to complete
- When you see PASS in green then the process is complete.
- Wait for the device to reboot
Its always good to do a factory reset after doing this process
For a more detail process on how to flash or upgrade Samsung devices, click here