The last couple of days ago, I tried to taste iOS 26. It’s a really awesome experience as an iOS user. But there were some issues that appeared when I was playing the games. So I downgraded to iOS 18.5. My phone is 13, and I checked my model number and downloaded 18.5 firmware from Apple user's well-known website and carefully making the downgrading process. After hours later I already got back 18.5, and I confess, the user experience is very different between iOS 26 and 18.5. The main problem is there, when I make phone calls with my friends and I notice my recent call history is empty. So I try to fix it the ways from YouTube videos. It doesn’t work. I tried to change the region and restart my phone. It doesn’t work, and I tried to syns with iCloud also doesn’t work. If you are facing an issue like mine, please kindly share the experience and how to fix it!
Kindly see the attached photos. The notification appears as shown, but when I check the recent calls, there is no data available.