183Other Important Safety Information• Only qualified personnel should service the phone or install the phone in a vehicle. Faulty installation or service may bedangerous and may invalidate any warranty applicable to the device.• Check regularly that all wireless phone equipment in your vehicle is mounted and operating properly.• Do not store or carry flammable liquids, gases or explosive materials in the same compartment as the phone, its parts oraccessories.• For vehicles equipped with an air bag, remember that an air bag inflates with great force. Do not place objects, including bothinstalled or portable wireless equipment in the area over the air bag or in the air bag deployment area. If wireless equipment isimproperly installed and the air bag inflates, serious injury could result.• Switch your phone off before boarding an aircraft. The use of wireless phone in aircraft is illegal and may be dangerous to theaircraft's operation.• Failure to observe these instructions may lead to the suspension or denial of telephone services to the offender, or legal action,or both.Product PerformanceGetting the Most Out of Your Signal ReceptionThe quality of each call you make or receive depends on the signal strength in your area. Your phone informs you ofthe current signal strength by displaying a number of bars next to the signal strength icon. The more bars displayed,the stronger the signal.If you're inside a building, being near a window may give you better reception.Understanding the Power Save FeatureIf your phone is unable to find a signal after searching, a Power Save feature is automatically activated. If yourphone is active, it periodically rechecks service availability or you can check it yourself by pressing any key.Anytime the Power Save feature is activated, a message displays on the screen. When a signal is found, your phonereturns to standby mode.Understanding How Your Phone OperatesYour phone is basically a radio transmitter and receiver. When it's turned on, it receives and transmits radiofrequency (RF) signals. When you use your phone, the system handling your call controls the power level. Thispower can range from 0.006 watts to 0.2 watts in digital mode.