How to activate your Arduino SIM May 25, 2021 12:46 Updated Go to https://arduino.cc/sim/activate. Follow the instructions to activate your trial. You will receive an email when your SIM has been activated. Activating the SIM may take up to 24 hours. You can review your plans here. Related articles How to connect the MKR GSM 1400 to Arduino IoT Cloud What are the credentials for the Arduino SIM card How to check the data usage on the Arduino Sim card How to modify Arduino SIM card subscription Is there coverage of the Arduino SIM card in my country?