Some TM stores are friendly enuf to cut the SIM for you. Others may try to charge you for a new SIM. Some new SIMs are designed so you can easily remove the outer sleve on the "big" SIM - makaing it smaller. Keep the outer sleve in case you want to use it in your old phone at some point. Getting a new SIM will NOT require a plan change. Do not be talked into a change.
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