You’ve never had sensor fail?!!
I wrote "very little problem".
I was using LIbre 2 with three different Android phones for more than 2 years and had two sensor failures.
I always made sure I have at least one spare sensor and Abbott replaced the failed ones within 2 weeks.
(I was using LIbre 1 with a phone for a few years prior and, again, had a couple of failures in that time.)
I was initially given a reader for Libre 1. My first sensor failure was with the reader. I soon gave it up as I did not want to carry addition stuff around with me and I always have my phone.
I now self fund a different CGM which talks to my pump but still have a couple of LIbre in my diabetes drawer as back up. Coincidentally, I used one earlier this month with no problems.