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Suddenly my phone cannot catch cellular data and started to require update. So tried to update via internet, and checked connection; it seems connecting, but update failed, message said because internet no longer connected. How can I solve my problems?
Try to optimize the range of the mobile network, see this Apple article:
If you see No Service or Searching on your iPhone or iPad
https://support.apple.com/en-us/HT201415
Check also the Wi-Fi network, see the following Apple articles:
Connect to Wi-Fi on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT202639
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
Try to optimize the range of the mobile network, see this Apple article:
If you see No Service or Searching on your iPhone or iPad
https://support.apple.com/en-us/HT201415
Check also the Wi-Fi network, see the following Apple articles:
Connect to Wi-Fi on your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT202639
If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
my situation is further strange. This phone is connecting with Wi-Fi, that’s the reason I can now read and write, but the settings says Wi-Fi off. And cannot see any information from cellular in general settings, I can see only white page. What should I do?
Thanks for your kind helps. But my situation is farther strange. This mobile is connecting with Wi-Fi but in the general settings show Wi-Fi off, and cellular settings page shows just a white page without any letters no information. What should I do?
Cellular connection failed, update failed, error message was doubtful
