It Is after all sync'd up to their "Cloud" and so should be able to sync back down if you change phones or need to do a full reset. I encountered a sensor that, with only one day left of its life, started giving me inaccurate readings, claiming my glucose https://sparktv.net/post/430764_https-www-payporter-com-tr-https-www-payporter-com-tr-wise-ile-geleneksel-bankac.html