I have an iPhone 7 with 32 GB memory. Out of these 27.3 are being used.For the last fifteen days I have been observing that contacts are mysteriously disappearing from the phone. Last week I added my sister's phone number and I observed this week that it is no longer there. I had made a backup two months ago in iTunes in Windows PC. Since then I added some Covid-19 apps. I don't want to restore the phone from backup but I only need my prevous Contacts file. Also I want a solution for this Mysteriously disappearing contacts. I had tried to make call while driving using CarPlay and I found that the contact is not there. Kindly help.