SMT-W5100 User Guide _5Installation/MaintenanceIf using a microwave or Bluetooth productsduring a call, the call may be affected.Do not expose the battery to direct sunshinefor a long time.Before executing the [MENU] Æ [8.System]Æ [4.Unregistration], double check whetherthis function should be executed since allphone information registered to the systemwill be deleted.Do not strike the phone or battery and donot drop them.Use a dry cloth for cleaning the phone. Donot use chemicals such as alcohol, wax,perfume, deodorant, etc. for cleaning.Do not disassemble, modify, or remodel thephone.Do not place the battery in hightemperatures or heat it.Do not strike the phone and battery severelyor puncture them with a pinnacle object.GeneralObey local regulations. Always turn off the phone in prohibited or dangerous places (e.g. hospital).