Motorola DROID 4 DROID 4 User's Guide - Page 8

If you have any problems unlocking or removing the rear cover, please take your smartphone to any Verizon Wireless store for assistance. Note: This product uses a non-removable battery. The battery should only be replaced by a Motorola-approved service facility. Any attempt to remove or replace your battery may damage the product and void your warranty. Tip: In the unlikely event that your device becomes unresponsive, try a forced reboot-press and hold both Power and the down volume key for up to 10 seconds. Touchscreen & keys a few essentials Touchscreen on/off Your touchscreen is on when you need it and off when you don't. • When you hold the smartphone to your ear during calls, your touchscreen sleeps to prevent accidental touches. • To make your touchscreen sleep or wake up, just press Power . • To change how long your smartphone waits before the screen goes to sleep automatically, touch Menu > Settings > Display > Screen timeout. • To make the screen lock when it goes to sleep, see "Screen lock" on page 54. To unlock the screen, press Power , then drag to the right. Note: Your touchscreen might stay dark if the sensor just above it is covered. Don't use covers or screen protectors (even clear ones) that cover this sensor. 6 Touchscreen & keys