ESP8266 how to disable automatically activating a new network?

Good morning.
I am starting my adventure with the Arduino Mega and the esp 8266 chip. I have recently purchased a Wemos D1 board and managed to connect it and program it in the Arduino IDE environment. However, I have encountered a problem because as soon as I connect the Wemos to the power supply, my phone shows a new WIFI network called "ESP-A7A601" ( I am not creating any access point in my sketch). How can I disable the automatic creation of a new network by esp?

Greetings
Krzysztof

You need to set the WIFI_STA mode which means client, not Access Point.

WiFi.mode(WIFI_STA);

Greetings

It worked, I added it before Wifi.begin. Thank you .
Interesting that previously after uploading even an empty sketch, without any commands, it still started the AP....

Greetings
Krzysztof

c_krzysiek wrote:

Interestingly, previously, after uploading even a blank sketch, without any commands, it still started the AP....

.
This is the default operation of the ESP8266.