I was never completely without hearing and it fluctuated because I have Ménière's disease, but it had not been useful in my left ear for several years. At the very beginning of the pandemic I lost almost all hearing in that ear (I was at 4% for a while), and most in my right ear for a while, but things improved gradually. My right ear has now been stable for over a year with moderate to sever hearing loss. The combination of a CI and a HA works well for me. I used my telelcoil less than two months after activation and it was fantastic. Much better than with my previous top end Widex hearing aids. My audiologist never stops empahasising that the more you put in, the more you get out. I spent a lot of time on rehab.