So far, so good. Have one of your grandchildren install it. I have a prepaid tariff. My phone's storage is limited, so I couldn't download the app to view and receive my messages. It has an amazing speaker, very clear and loud. I can easily answer and call. The blood pressure reading on the watch is similar to my Walgreen blood pressure cup. Compare the readings over several days. Get a baseline. I have an Android phone from 2019. If you are poor like me this is what you need. You can call for help and it's double locking so you don't lose it. Enjoy
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