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I actually did this because I had to return my phone. It turns out once my old phone was refurbished they also refurbished my number not knowing that I had kept the old card and put it in my new phone. So even though it technically worked you are supposed to use the new SIM card and then just have simple mobile switch your number once you register your new phone. Hope this helps.
Sorry, there was a problem. Please try again later.The sim card contain your account info, it can remove and swap as long they are the same size, there are 3 size, full, micro and nano, the newer phones use micro or nano.
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