This started happening on iOS 26.5, and it is still happening after updating to iOS 26.6 beta. The issue is severe enough that my Apple devices are currently not usable for basic communication. I have lost money, time, and thought way too much about this, so I’m really hoping for a resolution.
After setting up an iPhone 14 Pro Max on my Apple Account/iCloud, my Contacts, Messages, Phone, and related Apple communication services became essentially nonfunctional. This started after adding the iPhone 14 Pro Max, but it is no longer isolated to that phone. The issue has spread across my Apple devices, including my iPhone 15 Pro Max, iPhone 14 Pro Max, iPad, and Mac.
Current Affected devices/apps:
iPhone 15 Pro Max
iPhone 14 Pro Max
iPad Pro
Mac Mini M4
Contacts
Messages
Phone/calls
FaceTime or other calling/contact-related services
iCloud Contacts / Apple Account syncing
The apps themselves become unusable.
When I open Contacts, Messages, Phone, or related services, I usually get a blank/white screen, a frozen interface, or a briefly visible cached state. Sometimes I can see old message previews or the previous app state for a split second, especially after force restarting or using the app switcher, but I cannot scroll, select, call, text, or use the interface normally. After about 10 to 15 seconds, the app freezes or crashes.
This affects essentially all normal communication functions. I cannot open Contacts. I cannot read or use Messages normally. I cannot place or answer calls. I cannot use my contact list. I cannot use any of my phone numbers or receive verification codes to my phone number. The same failure appears across devices signed into the same Apple Account/iCloud.
Contacts still appear to exist on iCloud.com, which makes me think this may be an iCloud Contacts, Apple Account sync, contact-card corruption, or cross-device sync corruption issue rather than simply a local device problem.
Troubleshooting already attempted:
Updated to iOS 26.6 beta
Factory reset the iPhone more than once
Tried restoring from backup
Tried setting up from zero / fresh setup
Tried force restarting
Tried resetting SIM/cellular settings
Tried setting up with no SIM
Confirmed accounts were logged in
Confirmed mail/accounts were present and Contacts were enabled where applicable
Contacted Apple Support
Apple Support escalated the case to a senior engineer
Apple Support diagnostics reportedly came back “fine” or “flying colors,” but the devices are still unusable
Posted on Apple Support Community, but apple deleted my post and told me to post on the developer forum because I mentioned I updated to iOS 26.6 is beta software....
One possible thing: before this started, I had an AI agent attempt to update my personal contact card with a new phone number. This is an operation that normally goes well, but it was my personal card. I did not verify exactly what it changed. I do not know if this is related, but I am mentioning it because the issue feels like something corrupted in the Apple Account/iCloud contact or identity layer, and somebody in my last thread mentioned emoji or unusual characters might cause this kind of issue. It might have changed my card with some unusual character, field, label, or operation that broke iCloud syncing.
Another clue: this started after adding the iPhone 14 Pro Max to my Apple Account/iCloud. After that, the issue began affecting the rest of my Apple devices too. That is why I believe this belongs under iCloud / Apple Account / Contacts syncing rather than only iPhone.