Hitachi SH-G1000 - Manual (Page 27)

Section 2: Understanding Your Device
19 2A: Your PCS Phone – The Basics
5. Hold both sides of the battery, and then lift and remove the battery.
Note: If the battery is removed with the device on, data will be lost.
Note: If the main battery is removed when the backup battery is empty,
data on the device will be lost.
Note: If the device is left with the main battery removed for more than
five minutes, data on the device can be lost.
Tip: When the battery cover is removed from the device, the phone
function is turned off.
To turn the phone function back on, ensure the battery cover is firmly slid
into place and please do the following:
Ⅵ Press and hold the Power button for at least 2 seconds.
- or -
Ⅵ Tap phone antenna icon located at the top of the screen. A window
will popup. Tap Turn phone on.
Phone function is now turned on.