While waiting for your new sensor to pair, it's important to change it at a time that you will be available to continue checking your phone. times like while at the beach, sleeping, or even before a meal aren't the best times because you don't have access to your number. try to avoid these situations but if there's an emergency, its understandable. make sure to check your number before the sensor change and check your sugar every 45 minutes manually to make sure you're in range and not too low or high. we don't want to have a scenario where your sensor warms up and you're 300 or 50.