I recently upgraded my SIM-only deal (I was already on a SIM-only deal, and used the app to upgrade to a different SIM-only deal), however I have been sent a new SIM card. Do I need to use this, or can I keep using the old SIM? My new deal appears to be in use on the old SIM, so I’m not sure what the point of the new SIM is?
Best answer by andewhite
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