Follow any restrictions. Wireless devices can cause interference in aircraft.
Keep the phone and all its parts, including accessories, out of the reach
of small children.
Use only approved batteries and chargers. Disconnect the charger from
the power source when it is not in use. Do not leave the battery connected
to a charger for more than a week, since overcharging may shorten its lift.
Only qualified personnel should service the phone or install the phone in a
vehicle. Faulty installation or service may be dangerous and may
invalidate any warranty applicable to the device.