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I hope there's a lot of fixes and speed improvements.

At this point, I've encountered bugs with Safari, iCloud Drive, iCloud Messages, Siri, Music, AirDrop, and as always iCloud Keychain... all in one week. And my iPhone 12 feels slow somehow. This thing should never slow down in its life time, even with iOS 20 in 2027.
Your phone is old and slow. Get a 13 :D
 
I use two sims one physical and one virtual on iPhone 13. Data runs on e-sim. Since 15.4 iPhone keep swapping the two sims so that data is suddenly not available any move. I have to deactivate- reactivate both lines to fix it or reboot the iPhone. Is it fixed in 15.5?
 
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