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By Mint Fox

Originally published September 23, 2015


Last Updated November 2, 2022

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What the heck is a SIM Card?

SIM stands for Subscriber Identity Module, and it’s a removable card inside your cell phone that stores data unique to its user. Basically, it tells your wireless provider who you are, and it’s the thing that allows you to connect to their network. Without it, you can’t access your data or make phone calls, you’d just be rolling with WiFi.

Since the SIM card holds your identifying info, you can easily move it from phone to phone to access the same network and the same phone number. But we won’t tell if you still hit people with a, “new phone who dis?”

SIM Card Sizes

SIM cards come in three different sizes: Standard (Mini), Micro, Nano. To make life easy, some awesome carriers (ahem, like us) provide a 3-in-1 SIM card, which means we give you a triple cut SIM and you pop out the size that fits your device.

A few notes on sizes:


Standard (Mini) SIMs fit older devices like iPhones up to the 3GS model or Samsung Galaxy S


Micro SIMs fit devices circa 2012-2013 like the iPhone 4s or Samsung Galaxy S5


Nano SIMs fit the new guys like iPhone 5 and above or Samsung Galaxy S6 and above

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