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Best Prepaid SIM Card for Alarm Systems in 2024

The key to finding the most affordable prepaid alarm SIM card is all about leveraging the competitive rates offered by low-cost carriers. You'll get the same coverage for a fraction of the cost without the worry of hidden fees and price hikes. Here are the best value 5G internet providers to consider.

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We've got you covered if you're looking for an Alarm SIM card for your smart security system.

Using a SIM card in your alarm system works in the same way as a mobile device, it helps it communicate and notify you while you're away from home.

As you'll have to pay monthly for your SIM card, this is where MVNOs can help. These low-cost carriers have cheaper plans but operate on the same major US networks.

We've compared the best low-cost carrier SIM cards for alarm systems below.

Image of cell phone with US Mobile
US Mobile 10GB SIM card
Best SIM card with free trial
Image of cell phone with Tello
Tello 2GB SIM card
Best AT&T SIM card for alarm systems
$6/mo
Image of cell phone with Boost Mobile
Boost Mobile 5GB SIM card
Best T-Mobile SIM card for alarm systems
Image of cell phone with Mint Mobile
Mint Mobile 20GB SIM card
Best Verizon SIM card for alarm systems

Best SIM card with free trial

US Mobile 10GB SIM card

Image of cell phone with US Mobile
  • Verizon & T-Mobile coverage
  • No talk and text
  • Instant eSIM activation
10GB
data
$15/mo*
See at US Mobile

*$180 for 12 Mths Service

5 Read our US Mobile review
$720 in annual savings

Best AT&T SIM card for alarm systems

Tello 2GB SIM card

Image of cell phone with Tello
  • T-Mobile coverage
  • No talk and text
  • Instant eSIM activation
2GB
data
$6/mo
5 Read our Tello review
$828 in annual savings

Best T-Mobile SIM card for alarm systems

Boost Mobile 5GB SIM card

Image of cell phone with Boost Mobile
  • AT&T & T-Mobile coverage
  • No talk and text
  • Instant eSIM activation
5GB
data
$5/mo*
$15/mo
4 Read our Boost Mobile review
$730 in annual savings

Best Verizon SIM card for alarm systems

Mint Mobile 20GB SIM card

Image of cell phone with Mint Mobile
  • T-Mobile coverage
  • No talk and text
  • Instant eSIM activation
20GB
data
$15/mo*
$25/mo
See at Mint Mobile

*$45 for 3 Months

4.2 Read our Mint Mobile review
$630 in annual savings

What are the benefits of a prepaid data SIM card?

There's a range of benefits to choosing a cheap prepaid data SIM card from a low-cost carrier, you'll find the cheapest price with an MVNO.

  • Lower price: MVNOs offer affordable plans when purchasing a SIM card with one of these low-cost carriers. With all the same options available but at half the price of going direct to one of the big three.
  • Same excellent coverage: Being powered by the main networks, you'll get access to the same good coverage.
  • No annual contracts: There are no 24 or 36 months commitments or hidden fees with prepaid data SIM cards.
  • 4G LTE data speeds: You'll have access to the nationwide 4G LTE data speeds operating on the same wireless networks.
  • 5G network: If your mobile device is compatible, you can find deals on 5G SIM cards with low-cost carriers, offering 5G at no extra cost on their data-only SIM cards.

The best alarm SIM card on T-Mobile

Mint Mobile 15GB SIM card
  • T-Mobile 5G & 4G LTE network
  • No talk and text
  • 15GB data
$15/mo*
*$45 for 3 Months
See at Mint Mobile

T-Mobile vs Mint Mobile comparison

Keep your T-Mobile phone, number & coverage: Save $675 per year

Carrier Network Coverage 4G/5G Data Price Annual Cost
T-Mobile T-Mobile 4G & 5G Unlimited $75/mo $900/yr
Mint Mobile T-Mobile 4G & 5G 15GB $20/mo $225/yr
Savings $55/mo $675/yr

Check out our review of the best prepaid T-Mobile data SIM card


The best alarm SIM card on Verizon

US Mobile 6GB SIM card
  • Verizon & T-Mobile 5G & 4G LTE networks
  • No talk and text
  • 6GB data
$18/mo*
*30 Day FREE Trial
See at US Mobile

Verizon vs US Mobile comparison

Keep your Verizon phone, number & coverage: Save $684 per year

Carrier Network Coverage 4G/5G Data Price Annual Cost
Verizon Verizon 4G & 5G Unlimited $75/mo $900/yr
US Mobile Verizon 4G & 5G 6GB $18/mo $216/yr
Savings $57/mo $684/yr

Check out our review of the best prepaid Verizon data SIM card


The best alarm SIM card on AT&T

Boost Mobile 5GB SIM card
  • AT&T & T-Mobile 5G & 4G LTE networks
  • No talk and text
  • 5GB data

AT&T vs Boost Mobile comparison

Keep your AT&T phone, number & coverage: Save $730 per year

Carrier Network Coverage 4G/5G Data Price Annual Cost
AT&T AT&T 4G & 5G Unlimited $75/mo $900/yr
Boost Mobile AT&T 4G & 5G 5GB $15/mo $170/yr
Savings $60/mo $730/yr

Check out our review of the best prepaid AT&T data SIM card


Network coverage comparison

NETWORK OVERALL RELIABILITY SPEED DATA CALL
Verizon Coverage 95 96 94 96 94
AT&T Coverage 94 94 95 96 92
T-Mobile Coverage 86 88 82 89 82

Source: RootMetrics RootScore 2022 report

When it comes to 5G network coverage, T-Mobile scores the highest, according to the J.D. Power 2023 wireless network study.

Carrier customer service comparison


What is an alarm SIM?

A SIM card, which stands for Subscriber Identity Module, is a small chip you insert into a device to connect it to a cellular network. Because a SIM card will work in a similar way for an alarm system as a mobile phone, utilize one in your security system to let it function as a communication device.

You can use a GSM SIM card, which is a part of the GSM network, to join a cellular network by sliding it into the SIM card slot on your alarm system. Given that the GSM SIM card runs on the GSM network, you'll have the choice between a 2G, 3G, and 4G network, where you'll pay a monthly fee to connect your alarm system and portable devices.

SIM card for alarm systems

If you need to connect your alarm system to a cellular network in the same way you would your mobile phone, you'll need to buy a SIM card and pay a monthly fee for this service.

Whether you opt for a prepaid SIM card or one with a plan, your alarm system will be able to function on your cellular network by using this technology. You'll need an alarm system SIM card to get the most out of your alarm kit, so think of these devices like mobile phones when creating a wireless home security system your family can depend on.

Once you activate your alarm system SIM card and insert it into your device, you'll have a security system connected to the internet.


Compare the cheapest prepaid alarm SIM cards

Carrier Network Data Price
Tello 5GB SIM card T-Mobile 5G/4G Coverage 5GB $10/mo
Mint Mobile 15GB SIM card T-Mobile 5G/4G Coverage 15GB $15/mo $20/mo
Boost Mobile Unlimited SIM card AT&T & T-Mobile 5G/4G Coverage Unltd $40/mo
US Mobile Unlimited SIM card Verizon & T-Mobile 5G/4G Coverage Unltd $15/mo $29/mo
Visible Unlimited SIM card Verizon 5G/4G Coverage Unltd $15/mo $25/mo

How to switch to a cheap alarm SIM

Switching to a cheaper carrier is simple.

  1. Pick a plan. Consider how many connected devices you have, and then choose the amount of data you need.
  2. Prepare to make the switch. Make sure your current account is paid up and in good standing. If you're bringing a device, make sure it's unlocked for use on another carrier.
  3. Set up your new plan. You'll get a data only SIM card from your new provider. Follow their instructions to activate your new plan.

Alarm SIM card FAQs


Recap: What is the best alarm SIM card?

MVNOs offer cheap SIM card plans for your home alarm system, so having peace of mind that your home is safe doesn't have to be another expensive monthly cost.

You can use your wireless security 24/7 or just occasionally, but with plans starting as low as around $6 a month, there are affordable options for all.

Data SIM card guides

How we picked the best alarm SIM card

MoneySavingPro reviewed the best value data-only plans available and ranked them based on various factors.

The most important factor we considered was the price of each plan in comparison to other similar plans available in the market. We also evaluated data limits, network coverage, perks, customer feedback, and overall service quality.

We regularly monitor the market to keep track of new products and plan changes offered by carriers. This list is updated at least once a month or more frequently as necessary.

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