Do You Have a Best Cellular SIM Card?

What is a SIM Card?

To answer the question, “What is a SIM Card?” we have provided a detailed explanation below. A SIM Card or Subscriber Identity Module is a small plastic card containing a unique integrated circuit card identifier (ICCID). Buy Prepaid SIM Cards online for all four Nationwide networks: CDMA (Red), PCS (Yellow), GSM-A (Blue), & GSM-T (Pink). When you buy SIM Cards online, we ship them straight to you!

SIM Card SizesSIM Card Sizes - Standard SIM - Micro SIM - Nano SIM

Popular SIM Card Sizes Include:

  • Standard SIM Cards (Measurements: 15 x 25mm)
  • Micro SIM Cards (Measurements: 12 x 15mm)
  • Nano SIM Cards (Measurements: 8.8 x 12.3mm)

What Does a SIM Card Do?

A SIM Card is inserted into a phone to contact the network through your phone’s antenna. The questions, “What does a SIM Card do?” or “How does a SIM Card work?” can be answered with the same reply. A SIM Card is installed inside your phone, either in the back of your phone, or via a SIM Card tray in the side of your mobile device. This allows your phone to connect it to the network you are active with. These small cards store data such as your phone number, network configuration settings, and more. SIM Cards allow your phone to place calls, send SMS & MMS, and use mobile data. The SIM Card stores the configuration information for your phone number so your calls, SMS, MMS, and Data are routed correctly through the wireless network.

How To Activate a SIM Card

You can activate a SIM Card online or in a retail location. Our online portal provides one of the easiest ways to activate a SIM Card. Activate a SIM Card with your existing phone number by completing a port request from your old carrier. If you’d rather get a new phone number, the SIM Card activation is even easier. We have four networks to choose from, so you always have the best coverage in your area. If you already have everything you need, such as a SIM Card and mobile phone, go to our Activate page to activate your phone online! It’s quick and easy, with a step-by-step activation portal and the option to keep your number or get a new phone number. Our Customer Service Team is available 24/7 to assist you, should you need any help.

How Much is a SIM Card?

SIM Cards vary in price, but typically cost anywhere from $10 to $35. Buy a SIM Card Online from our online, US-based cell phone store at current sale prices and we’ll drop-ship it to you next day. Our online store can even activate a SIM Card before placing it in the mail, if you prefer.

We hope this page answers all of your questions about SIM cards. If you need any further assistance understanding SIM card sizes, what does a SIM card do, how to activate a SIM card, how much is a SIM card, or even what is a SIM Card please contact us at 1-970-549-2378 or email