I have a cellular data problem
Whenever I try to install my update it says there was a problem verifying the installment because I’m not connected to the internet but I am. Therefore I have no cellular data. How do I fix this?
iPhone XR, iOS 15
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Try first to optimize the range of the mobile network, see this Apple article:
If you see No Service or Searching on your iPhone or iPad
If you see No Service or Searching on your iPhone or iPad - Apple Support
Optimize the Wi-Fi network, see the following Apple articles:
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
If your iPhone, iPad, or iPod touch won't connect to a Wi-Fi network - Apple Support
Recommended settings for Wi-Fi routers and access points
Recommended settings for Wi-Fi routers and access points - Apple Support
If you need help with your Wi‑Fi password
If you need help with your Wi‑Fi password - Apple Support
If they are On, turn Off Hotspot & VPN.
Contact your carrier, check your data plan.