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Unable to connect to internet via 4/5G

Lesphilpot
Level 1: Joiner
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I have received my new 12 Pro Max and have carried out a side by side data transfer from my old phone via iCloud. I ha e downloaded the most recent iOS version and everything looks good , however when I move out my home WiFi I am unable to access any of my apps or internet when using 4/5G. Seems strange as my old phone didn’t have any of these issues.
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MI5
Level 94: Supreme
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@Lesphilpot 

You need to use your old sim in the new phone, or do a sim swap to activate the new sim Guide: Sim Swap: a mini guide 2017 update 

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)

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MI5
Level 94: Supreme
  • 128159 Posts
  • 614 Topics
  • 22504 Solutions
Registered:

@Lesphilpot 

You need to use your old sim in the new phone, or do a sim swap to activate the new sim Guide: Sim Swap: a mini guide 2017 update 

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
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