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Question about SIM cards

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Question about SIM cards

I currently have the Galaxy S2 and it uses a "normal/big" SIM card.

 

I am considering upgrarding soon to the Galaxy S4 that uses the "micro SIM" card.

 

I travel a lot and I dont risk traveling without a "back up phone", so in case something happens or I run out of battery, I switch SIM cards and I am back online.

 

So my question is.

 

Can I keep my old (S2) SIM card and have a new micro SIM card in the S4?

I understand that if the answer is yes I wont be using both at the same time.

 

Is there an expiration date on SIM cards? I read somewhere that if a SIM card is not used for a certain amount of time, it expires.

 

If the answer is "No", is there a work around to be able to put a micro SIM card to an old phone?

 

Thank you all in advance

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Professor

Re: Question about SIM cards

You cannot have two SIM cards tied to the same number. If you switch to a microSIM, you can get an adapter that will allow you to use the microSIM in your old phone.

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Re: Question about SIM cards

Thanks Max, that s what I thought too.

 

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