This manual introduces the use of NEC N940 mobile phone, including emergency service and safety precautions, general precautions for mobile phone, aviation safety rules, hospital safety rules and other contents.
This manual explains the safety and emergency procedures for the NEC NB40 mobile phone, covering topics such as emergency call handling, general handling precautions, and specific rules for aircraft, hospitals, and road use. It also details the proper use of the built‑in antenna, battery handling, and the importance of using only NEC‑approved accessories.
The later sections offer troubleshooting advice, including how to calibrate the touchscreen pen, resolve signal problems, and address power or SIM‑card issues. Repair information advises users to seek authorized NEC service centers, as the device contains no user‑serviceable parts. This manual is written in Chinese.
| Battery type | Lithium‑ion |
|---|---|
| SIM requirement | Valid SIM card required for network services |
The touchscreen pen may not be calibrated; calibrate the pen as described in the user manual.
Check the battery charge level and recharge the phone if the battery is depleted.
Move to an area with stronger signal strength or avoid locations with poor coverage such as high‑rise buildings.