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Changing network

Lorna2
Level 1: Joiner
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I have recently received a new SIM from a different provider. I tried to install but was informed by phone is locked. I have tried to phone the customer service number but due to being automated I can not find the answer I need. I have tried logging in to my O2 but as I no longer officially have an account I can not find help there. What else can I do to unlock my phone?

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MI5
Level 94: Supreme
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@Lorna2 

How to unlock here Guide: Unlocking an O2 phone to use a different SIM card 

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
  • 126869 Posts
  • 613 Topics
  • 21824 Solutions
Registered:

@Lorna2 

How to unlock here Guide: Unlocking an O2 phone to use a different SIM card 

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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