“My camera doesn't work: The camera of my iPhone 16 plus fails when opening it, it takes a long time or sometimes it doesn't open and that makes it very difficult for me when I want to take a picture taking into account that my cell phone is new”
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Lagging App:
Clear Space:
If little space remains, then things can most certainly lag. So, clear it.
Troubleshooting iPhone Storage:
Internal storage cannot be upgraded. It is what it is. So, the maximum internal storage capacity never increases, even if you upgraded your iCloud plan. Learn More here: What's the Difference Between Device Storage and iCloud Storage? Apple Support
So, what to do...
Clear Space Using my User Tips: