How to put the phone card in sim800a module?

The specific operation steps are as follows:

1. First, make sure that the power supply of the SIM800A module is connected and connected to the external antenna.

2. Find the SIM card slot on the SIM800A module, which is usually covered by a rectangular metal cover.

3. Use small pliers or fingers to gently open the metal cover to expose the hole in the SIM card slot.

4. Insert the metal chip of the phone card down into the SIM card slot, and pay attention to the metal contact direction to avoid dislocation.

5. Gently press the metal cover back to its original position to ensure that the SIM card is in good contact.

6. Connect the SIM800A module to the main control board by connecting the serial cable, and then connect the main control board to the power supply.