Deactivate a sim card
How do I deactivate a SIM card from a old Apple phone
iPhone 5s
Question marked as
Best reply
If you are taking out a SIM card to replace with a new one, then
Make sure both numbers are in the security section of your https://AppleID.apple.com account.
Settings, Messages, Turn off iMessage
Settings, Face Time, Turn off Face Time
Swap SIM cards
Settings, Messages, Turn on iMessage, SMS, MMS
Settings, Face Time, Turn on Face Time
If it is just an old card you no longer want and you are scrapping the phone:
then If you are still paying a monthly charge, call the network provider and stop the contract if you can
otherwise there is no need to deactivate anything.