I currently have a Tmobile G2 (HTC) and have received my new Galaxy S III today. It came with a new sim card, but I'm wondering if I have to use that one, or can I use my old one?
You have to use the new one it is a smaller than the old one .
If you have the desire to use some of the newer features like Wi-Fi Calling you'll need the newer SIM card.
Did your G2 even come with a microSims card? Or were you thinking about taking a pair of scissors to your old sims card to make it fit? Use the new card.
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