User's Manual

PM451 Android 9.0 User Manual

Safety Information

Please note PM451 is battery-embedded design with a removable battery. Unauthorized personnel are

strictly prohibited from disassembling the device.

In case your device does not work as expected, you are strongly recommended to restart it by pressing

and holding the power button for at least 12 seconds until the startup screen appears. If your phone has

encountered a serious error and cannot be recovered, you should reset your phone to factory settings. For

more details, please refer to Factory Data Reset.

Body-worn Operation

This device was tested for typical body-worn operations with the

front & back of the phone kept 0.59 inches (1.5 cm) between the

user's body and the front & back of the phone. A minimum

separation distance of 0.59 inches (1.5 cm) must be maintained

between the user's body and the front & back of the phone. Any

belt clips, holsters, and similar accessories containing metallic

components may not be used. Body-worn accessories that

cannot maintain 0.59 inches (1.5 cm) separation distance

between the user's body and the front & back of the phone, and

have not been tested for typical body-worn operations should be

avoided.

PROTECT YOUR HEARING

To prevent possible hearing damage, do not listen at high

volume levels for long periods. Exercise caution when holding

your device near your ear while the loudspeaker is in use.

Caution

: Factory data reset will erase all personalized settings and data saved in your phone,

such as Google account, apps, user data, etc. And factory data reset cannot undo.