用户手册 — Nokia 20

目录

• 1. For your safety

  4
• 2. Introduction

  5
  • System requirements

    7
  • Network services

    7
  • Communications software

    8
• 3. Getting started

  9
  • Setting up the terminal

    9
    • Installing the SIM card

      10
    • Mounting the terminal

      10
    • Placing the terminal

      11
    • Connecting the cables

      12
    • Entering the PIN code

      12
      • Changing the PIN code

        13
  • AT commands

    15
• 4. Light indicators

  16
• 5. Nokia 20 GSM Connectivity Terminal accessories

  18
• 6. Troubleshooting

  19
  • First things to check

    19
  • Reception is poor

    19
  • The PIN code is blocked

    20
  • The HyperTerminal connection does not function

    20
• 7. Care and maintenance

  21
• 8. Important safety information

  22
• 9. Technical specifications

  24