I need to replace my iphone 5 but am struggling to find a compatible iphone for my Dexcom6. Dexcom says it only works with up to ios 14.6 and all new iphones and the second hand ones I can find, are already updated to ios 15. Am wondering how others get round this? Only thing I can think to do is to buy a used phone on ios 15 and wait for Dexcom to say its compatible. Or is Dexcom just being cautious and will it work on ios 15?