PerformanceThird Party EquipmentUse only batteries, chargers, and authentic accessories approved by NEC. Modifications, the use of third party equipment, cables,or accessories that are not made or AUTHORIZED by NEC may invalidate any approval or warranty of your phone, may adverselyaffect the phone’s operation, and may be dangerous. For availability of approved accessories, check with your wireless phonedealer. Look for the NEC Authentic Accessories TM logo to know if the item has been approved by NEC for use with the NEC 535.ServiceThe wireless phone, batteries and charger do not contain user-serviceable parts. We recommend that your NEC wireless phonebe serviced or repaired by an NEC AUTHORIZED service center. Please contact your Service Provider or NEC at 1-800-637-5917if you believe that you require service. Any unauthorized service may invalidate the warranty of your wireless phone.Efficient UseFor optimum performance with minimum power consumption, hold your NEC 535 wireless phone (with the flip open) as you wouldany other phone and speak directly into the mouthpiece.BatteryThe NEC 535 phone contains an 700 mAh standard Lithium-ion battery. Battery performance depends on your location within thenetwork, signal strength, network configuration, the frequency at which your location is updated, the type of SIM in the phone, thephone features selected, battery age and condition, battery charging habits, temperatures to which the battery is exposed, cellbroadcast messages, the use of Full Rate or Enhanced Full Rate speech, as well as other factors.The battery is not fully charged when you buy your wireless phone but there may be enough power in the battery to turn thewireless phone on. Charge the battery by following the procedures on the page 23.AntennaYour phone has an internal antenna located at the base of the phone below the keypad. As with any other radio transmittingdevice, avoid touching the antenna area when the phone is turned On to optimize the antenna performance and talk time of thephone. Contact with the antenna area may affect call quality and may cause the phone to operate at a higher power level thanotherwise needed.19