diff --git a/README.md b/README.md
index 02fc955..e26068a 100644
--- a/README.md
+++ b/README.md
@@ -91,6 +91,20 @@ Check the SIM card status
              |   operator id: 23101
              | operator name: Orange
 ```
+First check if the Network Manager is istalled
+
+`sudo apt update`  
+`sudo apt install NetworkManager`  
+
+and running
+
+`sudo systemctl status NetworkManager`  
+`sudo systemctl start NetworkManager`
+
+Make it start automaticaly after the boot
+
+`sudo systemctl enable NetworkManager`
+
 Create configuration for the modem. Set `con-name 'Orange-LTE'` to any name and `apn 'internet'` to the APN name of your mobile provider
 
 `sudo nmcli connection add type gsm ifname '*' con-name 'Orange-LTE' apn 'internet' connection.autoconnect yes`