The receiver won't share, only the phone, and the receiver no longer sends data to the phone at all. My son is 52 pounds and it is a lot easier for him to have the receiver on a belt at school than carry a phone. His phone is able to pick up his receiver data from almost every classroom he goes into and if he goes out of range of his phone, it fills in the missing data points even if he just walks close enough to the phone for 5 minutes. With G5, the phone does not fill in missing data points when he is back in range so I would hypothetically get a number and an arrow, but not data points to see what is really happening. Also, I have heard from parents that you have to be back in range of the phone for quite a while, like 15 minutes before the phone and transmitter find each other again, while currently he only needs to pass by the phone for a couple of minutes with the receiver for the phone to get data, and also to get all of the missing data. The pros would be that I only would have to manage the phone, not the receiver and phone, but again if the phone takes longer to reconnect to the transmitter than it does reconnecting to the receiver (almost immediately now) then he has to get in range and stay in range of the phone for me to get anything like a complete picture of his data and the data lost when out of range of the phone gone for good. I would like to know how the algorithm works. If you leave range with a reading of say 95, and come back in range half an hour later, will the receiver and algorithm calculate the same blood sugar when you return as if you stayed in range and it saw all of your readings? The answer is that it must be the same because the phone and receiver with G5 would give the same reading and they don't communicate with each other at all so that means that the algorithm simply uses the last post calibration value and the current meter voltage and give you a number which is independent of what has happened in between, BUT the tech support says that the receiver (or now the phone as receiver) DO learn the individual over time.