The problem currently being experienced is an exact copy of that experienced at the tail end of last year, beginning of this year. I was also offered a replacement sensor at that time but the sensor is not the issue here. As before, it is a problem with the LibreLink app and the phones OS (in my case Android after the latest patch upgrade). Everything has been really stable since the last fix earlier this year with my phone very rarely reporting an out of sync message, but now I get it every 5 minutes (as before after an Android upgrade last November) although the phone is sitting right next to me. Scanning the sensor appears to re-establish the Bluetooth connection and if you coincidently scan just as you have passed your trigger point then you will get an alarm notification pretty soon after. However, once 5 minutes has passed and you get another “signal loss alarm”, then it is back to alarms being disabled. In the actual app there is a constant notification that the Alarms are unavailable due to 1) Channel Notifications disabled, 2) Lock Screen notification disabled, 3) Notification sounds disabled, 4) sound and pop-up notifications disabled. None of these apply to me. I can live with this during the day as I simply have to scan regularly, but where this becomes a real issue is overnight, where I have come to rely on an alarm waking me before my sugar levels drop too low. This is really disappointing. I have been really pleased with Version 2, as setting the alarms appropriately has really allowed me to gain a much better control over my BG levels with my HB1AC levels typically sitting between 6.3 mmol/l and 7mmol/l; and not suffering hypoglycaemic attacks, which for someone who has had Type 1 for 53 years is not too bad. Come on Abbott, the solution is there. We have been through this very same scenario before.