I've got an alert message, "Could not activate cellular data network"

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Level 1

4 points

I've got an alert message, "Could not activate cellular data network"

I just changed mobile phone from iPhone6 plus to iPhone12 mini with my existing SIM card yesterday,

however, I cannot access internet without wifi...

How can I resolve this issue? And is it OK with "3G" on top right screen, not "5G"?

ps. The cellular option is turned on at "Setting > Cellular > Celluar Data = ON" and iOS Ver. is updated to 14.3 after changing to iPhone12

Posted on Dec 17, 2020 3:05 PM

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Answer 1

sberman

Level 10

272,198 points

Dec 17, 2020 3:10 PM in response to hocheol32

If you see No Service or Searching on your iPhone or iPad - Apple Support

hocheol32 wrote:

And is it OK with "3G" on top right screen, not "5G"?

You cannot possibly achieve a 5G connection with the SIM from your previous iPhone. 5G requires both the SIM that came with the iPhone 12 Mini and a 5G plan with your cellular carrier.

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I've got an alert message, "Could not activate cellular data network"

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