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Do I need to use the new SIM I received when I upgraded my plan?

PaulTrickey
Level 1: Joiner
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I've just upgraded my SIM only plan online and the new tariff allowances are already showing on the MyO2 Account page.  I've been sent a new SIM which I'm expecting in a day or 2  but my question is - do I need to install this new SIM when I get it, or can I just keep the old SIM as I'm not changing the phone and everything seems to be working fine with MyO2 showing my new contract/tariff details?

TIA

Paul

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MI5
Level 94: Supreme
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@PaulTrickey 

Just continue with current sim and keep new one as a spare, unless your old sim is not 5g compatible.

If you want to switch to a 5g sim, just do a sim swap 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.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.

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MI5
Level 94: Supreme
  • 149993 Posts
  • 641 Topics
  • 28564 Solutions
Registered:

@PaulTrickey 

Just continue with current sim and keep new one as a spare, unless your old sim is not 5g compatible.

If you want to switch to a 5g sim, just do a sim swap 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.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.
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