Check out how to easily wipe cache partition in IRBIS TZ717. This operation won't affect your personal files it will only remove temporary cache files. As a result you can refresh Android 7.0 Nougat system and optimize Spreadtrum SC7731C.
Let's commence by turning your device off. You can do it by pressing and holding the Power button, then taping the Power Off option on the screen.
Next, press and hold the Power button and the Volume Up button together.
If the Android logo with No command written under it appears on the screen, you can release both buttons.
Now hold the Power button and press the Volume Up button to continue.
The Recovery Mode should appear on the screen at this point. Use the Volume buttons to move through the menu.
Afterward, move down to the Wipe cache partition and press the Power button to continue.
Then scroll down to Yes and press the Power button to confirm.
Wait until the process is complete, then select the Reboot system now and press the Power button to continue.