Kyocera Phone 2235 - Manual (Page 9)

Warning
Use only Kyocera approved accessories with Kyocera phones. Use of any
unauthorized accessories may be dangerous and will invalidate the phone
warranty if said accessories cause damage or a defect to the phone.
Optimize your phone’s performance
Use the guidelines on see page 3 to learn how to optimize the performance
and life of your phone, antenna, and battery.
Air bags
If you have an air bag, DO NOT place installed or portable phone equipment
or other objects over the air bag or in the air bag deployment area. If
equipment is not properly installed, you and your passengers risk serious
injury.
Potentially unsafe areas
Posted facilities– Turn your phone off in any facility when posted notices
require you to do so.