Hi. I changed the ID plan on my daughters phone and ID sent out a new sim card. I assumed we had to use it so I put it in the phone and followed the instructions but after 24hrs she still couldn't make or receuve calls. I then read on here that you don't HAVE to use the new sim so I've put her old one back in and it's made no difference. Any help would be really appreciated. ThanksÂ
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