There is another factor to consider re phone vs reader, that being the information and stats that you get are different from the two devices. It is why I actually use both and it is a pain; I have reported it to Abbott as I don’t really see why, technically, this should be the case. Anyway, I use the phone to get a quick look at stats because it is better than the reader and gives some information, estimated HbA1c for example, that the reader doesn’t. On the other hand, the reader and its associated software provide more detailed reporting - the glucose pattern insight is very useful - and I usually print off some reports and take to my appointments with my consultant. I have also used them as evidence to claim benefits. Hope this is helpful.