Sony SGPT21 - Manual (Page 4)

The touch screen does not work as expected.
The date and time are reset.
To erase the tap sound (operation sound).
The screen does not rotate when you turn your tablet device.
To turn off screen rotation.
To deactivate the lock function/to use your tablet device without locking the screen.
A headset cannot be used.
The file cannot be displayed/be played back.
The video is interrupted/is jumpy/is not synchronized with the audio.
Your tablet device cannot receive GPS signals or takes a long time for the positioning.
The results of GPS positioning may be different from the actual location.
The photos and movies taken with the camera are blurry.
You cannot send (Throw) content to another device and play it back with DLNA apps.
Some applications are not displayed in the selected language.
Some applications cannot be uninstalled.
A website for mobile phones or smartphones is displayed.
You cannot use Internet telephone or voice chat.
Your tablet device cannot connect to a Wi-Fi network.