Huawei Ascend G630-U20 Quick Start - Manual (Page 18)

Cleaning and maintenance
• Keep the device and accessories dry. Do not attempt to dry it
with an external heat source, such as a microwave oven or hair
dryer.
• Do not expose your device or accessories to extreme heat or
cold. These environments may interfere with proper function
and may lead to fire or explosion.
• Avoid collision, which may lead to device malfunctions,
overheating, fire, or explosion.
• Before you clean or maintain the device, stop using it, stop all
applications, and disconnect all cables connected to it.
• Do not use any chemical detergent, powder, or other chemical
agents (such as alcohol and benzene) to clean the device or
accessories. These substances may cause damage to parts or
present a fire hazard. Use a clean, soft, and dry cloth to clean
the device and accessories.
• Do not place magnetic stripe cards, such as credit cards and
phone cards, near the device for extended periods of time.
Otherwise the magnetic stripe cards may be damaged.
• Do not dismantle or remanufacture the device and its
accessories. This voids the warranty and releases the
manufacturer from liability for damage. In case of damage,
contact an authorized service center for assistance or repair.
• If the device screen is broken in a collision, immediately stop
using the device. Do not touch or attempt to remove the broken
parts. Promptly contact an authorized service center.
Emergency calls
The availability of emergency calls is subject to your cellular
network quality, service provider policy, and local laws and
regulations. Never rely solely on your device for critical
communications like medical emergencies.