Very disappointed in Abbott ☹️ The sensors are garbage. They register with the app, then have to wait an hour, then it tells me the sensor needs to be reactivated. Another hour, still doesn't work. There is a 40% + failure rate on these sensors since I've been using them for the last 18 months. Useless. Avoid Abbott labs, and if insurance allows, go with Dexcom or continue to manually test instead of wasting time and money on these stupid, unreliable devices.