A SIM card, or subscriber identity module, is a small card in your cellphone that lets you place phone calls, send text messages, and more.
You can remove the SIM card from your Samsung Galaxy S10 using the SIM removal tool that came with your phone, or a very thin paperclip.
Learn what an eSIM is, how to set one up, and why digital SIM cards are transforming mobile connectivity. Discover the best eSIM options for travel, iPhone, and Android in this complete 2025 guide.
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