I have to switch back to my old pre-paid phone for a short time. Will I be able to re-use the old SIM card or will I have to buy a new one?

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I have to switch back to my old pre-paid phone for a short time. Will I be able to re-use the old SIM card or will I have to buy a new one?
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Karen

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Posted 1 year ago

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Robert, Mobile Master

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Hello Karen,

It depend how much time you haven't used that SIM card. If it's been more then 90 days, then it is expired!
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Allan, Mobile Master

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If your current sim card is the same size as your old one then you can simply just put your current one in your old phone.
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Dennis, Mobile Master

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What are yo using right now?  Are you on Koodo post paid?
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Karen

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I am koodoo prepaid ... had been using a Samsung 111 ... got a new 6S but it isn't working properly, so need to switch back to the 3 until the 6S gets fixed.  The SIM cards are not interchangeable.  It's been less than 90 days since the SIM card was used, so does that mean I should be able to switch back to it without issue?
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Allan, Mobile Master

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You should, yes. Just try inputting the sim number on the Koodo site under change phone. This should activate the old one and allow you to use it.
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Ray

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In my experience, prepaid SIMs do not work this way. Once you activate a new prepaid SIM, the old one becomes invalid immediately. Last time I changed to a phone with a SIM card of a different size than the previous one, this is what happened.
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Chad Burr, Mobile Master

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Prepaid Sims are one time use..if you switch your service to another size sim, you'll have to buy a new size SIM for when you switch back.

Best thing to do is buy a nano sim and a pack of high quality sim adapters. I've had bad luck with plastic adapters so I recommend then metal ones. You can usually find a pack of them on eBay or those boutique cell stores. Be careful though, any damage they might cause isn't covered by any warranty.