Me and my family are switching to at&t from t-mobile because we just can't rely on their signal anymore. At&t is going to be sending us sim cards for their service but we are all going to be keeping our phones. I just wanted to know in general how does this work and what are the steps to take to be able to keep the info that we have on our phones. Me, my sister, and my dad have iphones while my mom has a galaxy s4. Thanks!
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New sim card with same phone?