Hi, We suggest you to perform Wipe cache on your device. This will not erase personal data on the phone.
It deletes temporary cache files in the phone.
1) Turn off the device.
2) Press and hold the Volume Up key and the Power Key
3) When the Android logo displays, release all keys.(("Installing system update" is displayed before displaying the Android system recovery menu options).
4) Press the Volume down key several times to highlight “wipe cache partition.”
5) Press the Power key to select.
6) Press the Volume down key to highlight “yes” and press the Power key to select.
7) When the wipe cache partition is complete, “Reboot system now” is highlighted.
