As above I usually start sensor with reader first then I phone second , find it easier to carry reader with me because of its size. dropped a clanger started sensor with phone , now I'm wondering how to upload from phone to libre view on my laptop .On a slightly different subject when ever i contact Abbott customer services to report another couple of sensor failures, it always seems to be the replacement sensors they send out that seem to stop working a couple of days after fitting, never had one last the full 14 days ,