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GSM SIM card bring your own phone plans

Nationwide Coverage4G LTE Data SpeedKeep Your Phone & NumberNo Contract
Best No Data Plan
0GB LTE Data
$0* per month
Powered by:Sprint

See Deal

* $20 Off for 6 Months

Best 3GB Plan
3GB LTE Data
$15 per month
Powered by:Verizon

See Deal

Free Starter Kit with code: MSPUSM

Best 4GB Plan
4GB LTE Data
$18.75* per month
Powered by:AT&T

See Deal

* 25% Off for 3 Months

Best Unlimited Plan
Unltd LTE Data
$30* per month
Powered by:T-Mobile

See Deal

* $90 for 3 Months Service


Ting GSM SIM Card

* $20 Off for 6 Months
Starting at$0*
Powered by:SprintT-MobileVerizon
500 Mins & No Data5001,0000GB$0*
500 Mins & 500MB Data5001,0000.5GB$10*
100 Mins & 1GB Data1001,0001GB$10*
100 Mins & 2GB Data1001,0002GB$14*
500 Mins & 1GB Data5001,0001GB$16*
1000 Mins & 500MB Data1,0001,0000.5GB$19*
500 Mins & 2GB Data5001,0002GB$20*

US Mobile GSM SIM Card

Free Starter Kit with code: MSPUSM
US Mobile
Starting at$10
Powered by:VerizonT-Mobile
2.5GB DataUnlimitedUnlimited3GB$15
Unlimited Talk & TextUnlimitedUnlimited0GB$10
10GB DataUnlimitedUnlimited10GB$30
Unlimited DataUnlimitedUnlimitedUnlimited$40
Ultra Mobile
Starting at$10
Powered by:T-MobileSprint
1GB Data for 12 Months* $120 for 12 MonthsUnlimitedUnlimited1GB$10*
Unlimited Talk & TextUnlimitedUnlimited0GB$16
1GB DataUnlimitedUnlimited1GB$19
2GB DataUnlimitedUnlimited2GB$23
6GB Data* $300 for 12 MonthsUnlimitedUnlimited6GB$25*
5GB DataUnlimitedUnlimited5GB$29
Unlimited Data* 20% Off All Monthly PaymentsUnlimitedUnlimitedUnlimited$39*
Red Pocket Mobile
Starting at$10
Powered by:AT&TSprintT-MobileVerizon
500MB Data5005000.5GB$10
1GB Data1,000Unlimited1GB$15
3GB DataUnlimitedUnlimited3GB$19
8GB DataUnlimitedUnlimited8GB$30
10GB DataUnlimitedUnlimited10GB$40
20GB DataUnlimitedUnlimited20GB$40
Unlimited DataUnlimitedUnlimitedUnlimited$60

Good2Go Mobile GSM SIM Card

* Double Data for 3 Months
Good2Go Mobile
Starting at$10
Powered by:AT&T
Unlimited Talk & TextUnlimitedUnlimited0GB$10
1GB DataUnlimitedUnlimited2GB$15*
3GB DataUnlimitedUnlimited6GB$20*
5GB DataUnlimitedUnlimited10GB$30*
10GB DataUnlimitedUnlimited20GB$40*

PureTalk USA GSM SIM Card

* 25% Off for 3 Months
PureTalk USA
Starting at$15*
Powered by:AT&T
4GB DataUnlimitedUnlimited4GB$18.75*
2GB DataUnlimitedUnlimited2GB$15*
6GB DataUnlimitedUnlimited6GB$22.50*
10GB DataUnlimitedUnlimited10GB$26.25*
20GB DataUnlimitedUnlimited20GB$33.75*
Unlimited DataUnlimitedUnlimitedUnlimited$41.25*
Mint Mobile
Starting at$15
Powered by:T-Mobile
Unlimited Data* $90 for 3 Months ServiceUnlimitedUnlimitedUnlimited$30*
3GB Data* $45 for 3 Months ServiceUnlimitedUnlimited3GB$15*
8GB Data* $60 for 3 Months ServiceUnlimitedUnlimited8GB$20*
12GB Data* $75 for 3 Months ServiceUnlimitedUnlimited12GB$25*
Unreal Mobile
Starting at$15
Powered by:AT&T
3GB Plan* $45 for 3 monthsUnlimitedUnlimited3GB$15*
8GB Plan* $60 for 3 monthsUnlimitedUnlimited8GB$20*
12GB Plan* $75 for 3 monthsUnlimitedUnlimited12GB$25*

h2o Wireless GSM SIM Card

* 25% Off for 3 Months
h2o Wireless
Starting at$15*
Powered by:AT&T
6GB DataUnlimitedUnlimited6GB$22.50*
2GB DataUnlimitedUnlimited2GB$15*
15GB DataUnlimitedUnlimited15GB$30*
Unlimited DataUnlimitedUnlimitedUnlimited$37.50*

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Disclaimer: MoneySavingPro is a free price comparison service but we do not provide service directly. We do our best to keep all the information up to date but there may be some discrepancies between the price you pay.

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Prepaid GSM Phone Plans

You have probably heard of inserting your SIM card when activating service with your carrier, no matter the device. It could be your phone, your tablet, or whatever - it's a useful piece of universal equipment.

However, what exactly is a SIM card? Furthermore, since SIM cards are both used by GSM and CDMA networks, what are GSM and CDMA networks? Which MVNOs are compatible with GSM SIM cards?

Hence, this article. Not only will you find information regarding what MVNOs are compatible with the GSM network, but you'll also learn more about the SIM card, the difference between GSM and CDMA, and information regarding the Internet of Things.

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What Is a SIM Card?

First thing's first: you're probably unsure as to what a subscriber identity module card is.

Well, a subscriber identity module (SIM) card is a type of smart card that is made for mobile devices. More or less, this tiny card sports your unique identification number, your personal data such as contacts, and more. This card helps you connect with your mobile phone provider and allows you to participate in its network. However, if the mobile SIM card is removed from the SIM card slot, then service will be discontinued.

In other words, a SIM card lets the mobile operator know who you are and whether or not you have permission to access the network with your phone number and other credentials.

There are, of course, different sizes of mobile SIM cards. Depending on your cell phone model and the size of the SIM card slot, you may need a standard SIM, micro SIM, or nano SIM card. The standard SIM represents the second generation of SIM cards, measuring 25mm x 15mm x 0.76mm. The micro SIM is the third generation of SIM cards, measuring 15mm x 12mm x 0.76mm. Finally, the nano SIM acts as the fourth generation of SIM cards, measuring at 12.3mm x 8.8mm x 0.67mm.

Switching Carriers

When you want to switch providers and would like to bring your own phone, then you'll probably be forced to unlock your phone's SIM card. Fortunately, the SIM unlocking process is simple. You may have to have your carrier unlock your phone, but sometimes your carrier won't. After all, some carriers may have rules to see who is qualified for a SIM unlock code. For instance, you may still owe money on your phone, so they won't want to give up the unlock code. Fortunately, you can always contact an unlocking service.

International SIM Cards

International SIM cards are a great option if you're a constant traveler (otherwise we would recommend the local SIM card). With an international SIM card, you'll receive coverage in the specified location. Furthermore, sometimes you may receive low international rates with the international SIM card.


GSM and CDMA are two different mobile phone technologies. GSM stands for Global System for Mobile Communications. CDMA, on the other hand, stands for Code Division Multiple Access. GSM is more globally accepted compared to CDMA. But what's really the difference? Basically, the difference lies in the method of radio wave conversion - the same radio waves that your cell phone broadcasts.

GSM divides the frequency bands so that more than one user can dial a phone number using a tower simultaneously. CDMA networks, on the other hand, layer digitized calls over each other and unpack them on the back end thanks to the issuance of sequence unlock codes.

But who exactly relies on what technology?

Verizon and Sprint both rely on CDMA technology, while AT&T and T-Mobile networks use GSM technology. So expect GSM SIM cards with AT&T and T-Mobile networks, but CDMA SIM cards with Verizon and Sprint for your CDMA phone.


Below, you'll find a list of the MVNOs that are compatible with the GSM network. With a GSM network, you'll need a prepaid SIM card.

Some MVNOs offer a free prepay SIM card, whereas others will have you pay for a SIM card.

There are dozens of GSM-compatible MVNOs, but the above are just a few of our favorites.

Smart Device SIM

As you might have noticed, more devices are being connected to each other. This is known as the Internet of Things.

The Internet of Things is the inter-networking of physical devices, vehicles, buildings and other items embedded with electronics, software, sensors, actuators, and network connectivity which enable these objects to collect and exchange data.

One such example happens to be smartwatches being connected to the smartphone - for instance, the Samsung Gear S2 interacts with the Samsung Galaxy phone series or the Apple iPhone 7 with the Apple Watch or the Apple iPad. All of these devices rely on each other thanks to the exchange of useful information.

Another relevant example is SIM cards, and how they are not only used in smartphones but also in tablets, GPS trackers, smartwatches, and more. In other words, your SIM card is a valuable piece of plastic, containing your unique identity within these items.

Not only that but carriers like US Mobile and TPO offer SIM cards specifically for non-smartphones. You'll notice at times when you bring your own phone to a GSM network that you'll need a GSM phone. So be sure to check whether or not you have a GSM phone or CDMA phone with the carrier's official network compatibility page.


As you can tell, there are plenty of mobile providers that rely on GSM technology and SIM cards.

Overall, it's best to be certain that, when you select a GSM network, that you have a GSM-compatible phone. Otherwise, you'll have to purchase an unlocked phone from a retailer or a phone directly from the provider, which could cost you.

SIM cards are useful for giving a data plan to a plethora of devices such as activity trackers, alarm systems, smart watches, and more. For more information, reviews, and comparisons check out our connected devices directory.

Michelle McLean

Michelle McLean


What is a GSM SIM card?

A SIM (Subscriber Identity Module) card is a removable memory chip that stores information unique to the cell phone user.

What does a GSM SIM card do?

Cell phones need a SIM card in order to connect to a phone network in order to make calls.

How do I remove a GSM SIM card from my phone?

The position of the access cover varies by phone but it’s usually on the side of the device. To remove the SIM card, use an eject tool or paper clip and push to release the SIM card tray.

How do I insert a GSM SIM card into my phone?

The position of the access cover varies by phone but it’s usually on the side of the device. Place the new SIM card into the SIM card tray and slide the tray into your phone.

What SIM card size do I need?

There are 3 SIM card sizes: standard, micro and nano SIM. All phones released since 2014 (Apple iOS and Android) now support the nano SIM card. Older phones will require either the standard or micro SIM card but most MVNOs will send out a SIM card that can be adapted to all 3 sizes.

How much does a GSM SIM card cost?

The cost of the GSM SIM card varies between carriers. Typically, the cost is $4-5 but some carriers offer free SIM cards with their prepaid cell phone plans.

Where can I buy a new GSM SIM card?

You can purchase a GSM SIM card online or in a cell phone or electronics store.

How do I activate my new GSM SIM card?

Activating your new GSM SIM card is straight forward. When you receive your SIM card, contact the carrier and they will talk you through the activation process.

How do I configure my new GSM SIM card?

You may need to adjust the APN settings on your phone. The carrier will help you with this during activation.

Will my device work with a GSM SIM card from another carrier?

Any unlocked device with a GSM SIM card slot should work. However, phone compatibility does vary by exact device and carrier, so it’s important to check that your phone is supported on the carrier website, prior to ordering a new SIM card.

Can I keep my phone number when I switch the SIM card?

Yes, it’s simple to transfer your phone number when you bring your phone to a new carrier.

Do these low-cost carriers provide cell phone coverage in my area?

Although you may not be familiar with some of the carriers, all MVNOs are powered by one or more of the 4 major networks (Verizon, T-Mobile, AT&T and Sprint). Therefore, you should not experience any loss in service.

Prepaid SIM Card Comparison

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