We maywhen you click our links.

Full Advertiser Disclosure:

MoneySavingPro believes everyone should be able to cut their bills and choose the best deal based on their individual requirements. While our site doesn't feature every carrier or provider available on the market, we're sure you'll be able to make significant savings from the information we provide and the free independent tools we create.

How can we provide this service for free? Our partners compensate us. This may influence which plans we compare and review and write about, but it does not effect our recommendations or advice, which are based on thousands of hours of research. Our partners cannot pay us to guarantee favorable reviews of their products or services.

Deal of the Month: Ting Unlimited for $25/mo*

Compare the Best Cheap GSM Plans

The cheapest GSM carrier plans in 2021

1GB 5G & 4G LTE data
$10 /mo*
Powered by:

See Deal

4GB 5G & 4G LTE data
$15 /mo*
Powered by:

See Deal

* $45 for 3 Months Service
12GB 5G & 4G LTE data
$20 /mo*
Powered by:

See Deal

Free Starter Kit with code: MSPUSM
Unltd 5G & 4G LTE data
$25 /mo*
Powered by:

See Deal

* $20 Off for 3 Months
99% coverage4G & 5G speedBring your phoneNo contracts
Big wireless coverage at small prices: switch & save up to $600 a year

Unlimitedmins

Unlimitedtexts

1 GB

4G/5G data

$10/mo

$10.00 per GB

Powered by: T-Mobile

Tello SIM Card
  • 24/7 customer support
  • No contracts
  • Budget friendly family plans
Average Customer Rating83 User Reviews
Mint Mobile 4GB data plan* $45 for 3 Months Service

Unlimitedmins

Unlimitedtexts

4 GB

4G/5G data

$15/mo*

$3.75 per GB

Powered by: T-Mobile

Mint Mobile SIM Card
  • Offers the latest phones with 0% finance
  • Prepay months in bulk for more savings
  • Reliable network coverage
  • Works with most GSM phones
Average Customer Rating204 User Reviews
US Mobile 12GB data planFree Starter Kit with code: MSPUSM

Unlimitedmins

Unlimitedtexts

12 GB

4G/5G data

$20/mo

$1.67 per GB

Powered by: Verizon & T-Mobile

US Mobile SIM Card
  • Flexible, no contract plans
  • 24/7 customer service
  • 5G coverage available
Average Customer Rating65 User Reviews
Ting unlimited data plan* $20 Off for 3 Months

Unlimitedmins

Unlimitedtexts

Unlimited

4G/5G data

$25/mo*

$45/mo

Powered by: T-Mobile & Verizon

Ting SIM Card
  • Simple plans for light phone users
  • Customer service
  • Nationwide LTE and 5G coverage
  • Good selection of handsets
Average Customer Rating50 User Reviews
Ultra Mobile 2GB data plan* Extra 20% Off with code: MSP20

Unlimitedmins

Unlimitedtexts

2 GB

4G/5G data

$11/mo*

$14/mo

$7.00 per GB

Powered by: T-Mobile

Ultra Mobile SIM Card
  • Simple account dashboard
  • Unlimited international talk and text
  • Nationwide coverage
Average Customer Rating55 User Reviews
Good2Go Mobile 3GB data plan* 50% Off for 3 Months

Unlimitedmins

Unlimitedtexts

3 GB

4G/5G data

$10/mo*

$20/mo

$6.67 per GB

Powered by: AT&T & T-Mobile

Good2Go Mobile SIM Card
  • 4G LTE coverage
  • No contract
  • No credit checks
Average Customer Rating32 User Reviews
Mint Mobile 15GB data plan* $75 for 3 months Service

Unlimitedmins

Unlimitedtexts

15 GB

4G/5G data

$25/mo*

$1.67 per GB

Powered by: T-Mobile

Mint Mobile SIM Card
  • Offers the latest phones with 0% finance
  • Prepay months in bulk for more savings
  • Reliable network coverage
  • Works with most GSM phones
Average Customer Rating204 User Reviews
Unreal Mobile 50GB data plan* Buy 1 Month Get 2 Months Free

Unlimitedmins

Unlimitedtexts

50 GB

4G/5G data

$50/mo*

$1.00 per GB

Powered by: AT&T

Unreal Mobile SIM Card
  • No contracts
  • Unlimited everything
  • Good user account dashboard
  • International calling to 80+ countries
Average Customer Rating32 User Reviews
Ting 5GB data plan* $5 Off for 6 Months

Unlimitedmins

Unlimitedtexts

5 GB

4G/5G data

$20/mo*

$25/mo

$5.00 per GB

Powered by: T-Mobile & Verizon

Ting SIM Card
  • Simple plans for light phone users
  • Customer service
  • Nationwide LTE and 5G coverage
  • Good selection of handsets
Average Customer Rating50 User Reviews
Good2Go Mobile 1GB data plan* 50% Off for 3 Months

Unlimitedmins

Unlimitedtexts

1 GB

4G/5G data

$7.50/mo*

$15/mo

$15.00 per GB

Powered by: AT&T & T-Mobile

Good2Go Mobile SIM Card
  • 4G LTE coverage
  • No contract
  • No credit checks
Average Customer Rating32 User Reviews
We currently have no deals for that combination, please change the filters
Loading...

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.

Big savings, no compromises
Nationwide CoveragePowered by the major networks
Bring your own phoneKeep your existing phone and number
4G LTE data speedsSame fast speeds as the big guys
No contractsFlexible and commitment-free
Customize your planOnly pay for what you use
Buy onlineNo need to visit a store
Compare Cheap GSM Plans Hero
Same coverage, massive savings!
Stop the Unlimited Data Plan Rip Off!
CarrierNetworkDataPriceAnnual
VerizonVerizon 4G & 5GUnlimited*$80/mo$960/yr
US MobileVerizon 4G & 5G5GB$15/mo$180/yr
*Avg. data usage only 3-5GBSavings$65/moSavings$780/yr
Coverage CheckerFind great value plans with the best coverage in your area
Find cheap plans in your area
Lady shouting
Switching & saving is simple
1
Customize your planDon't pay for data you don't use
2
Bring your own phoneKeep your phone & number
3
Order SIM card onlineInsert your new SIM card & activate

The best GSM phone plans in October

Are you looking for a cheap cell phone plan on the GSM network? With T-Mobile and AT&T MVNOs there's something for all budgets.

MVNOs are low cost carriers that are powered by the main US networks, but with plans starting at as little as $11 a month. If you've not heard of MVNOs they're quickly growing in popularity as one of the best ways to cut the cost of cell phone bills.

With such a wide range of options available we've broken it down for you below to help you find your ideal GSM plan.

Best cheap T-Mobile GSM plan

Mint Mobile 4GB data plan* $45 for 3 Months Service

Unlimitedmins

Unlimitedtexts

4 GB

4G/5G data

$15/mo*

$3.75 per GB

Powered by: T-Mobile

T-Mobile vs Mint Mobile Plan Comparison

Keep your T-Mobile phone, number & coverage: Save $660 per year

CarrierNetwork Coverage4G LTE DataPriceAnnual Cost
T-MobileT-Mobile 4G LTEUnltd*$70/mo$840/yr
Mint MobileT-Mobile 4G LTE4GB$15/mo$180/yr
*Don't waste money on unlimited data - Avg. data usage is only 3-5GBSavings$55/mo$660/yr

Best cheap AT&T GSM plan

Good2Go Mobile 3GB data plan* 50% Off for 3 Months

Unlimitedmins

Unlimitedtexts

3 GB

4G/5G data

$10/mo*

$20/mo

$6.67 per GB

Powered by: AT&T & T-Mobile

AT&T vs Good2Go Mobile Plan Comparison

Keep your AT&T phone, number & coverage: Save $690 per year

CarrierNetwork Coverage4G LTE DataPriceAnnual Cost
AT&TAT&T 4G LTEUnltd*$75/mo$900/yr
Good2Go MobileAT&T 4G LTE3GB$20/mo$210/yr
*Don't waste money on unlimited data - Avg. data usage is only 3-5GBSavings$55/mo$690/yr

Best GSM carriers

Tello SIM Card - Best prepaid GSM plan - TelloTello SIM Card - Best prepaid GSM plan - Tello
Minutes
Unlimited
Texts
Unlimited
Data
1 GB
Price
$10/mo
Editors Take
5 / 5
Plans
PlanMinutesTextsDataPrice

Tello Unlimited Talk & Text

Unlimited

Unlimited

0GB

$8

Tello 1GB Data

Unlimited

Unlimited

1GB

$10

Tello 2GB Data

Unlimited

Unlimited

2GB

$14

Tello 4GB Data

Unlimited

Unlimited

4GB

$19

Tello 6GB Data

Unlimited

Unlimited

6GB

$24

Tello 8GB Data

Unlimited

Unlimited

8GB

$29

Tello Unlimited Data

Unlimited

Unlimited

Unlimited

$39

Features
Benefits

Pros

  • 24/7 customer support

  • No contracts

  • Budget friendly family plans

Cons

  • No roaming

  • Coverage in rural areas

Benefits

  • Service on the nationwide T-Mobile network

  • Money-back guarantee on phones (no refunds on plans)

  • Prepaid - no contract, credit check, or activation fee

  • Bring your own phone or choose from a modest selection of new or refurbished devices

  • Keep your current phone number

  • Use of your plan data as a mobile hotspot through your phone is allowed

  • Use your minutes to call Canada, China, and Mexico

  • Minutes to other countries available as add-on

  • 24/7 customer service

Mint Mobile SIM Card - Best GSM plan for unlimited data - Mint MobileMint Mobile SIM Card - Best GSM plan for unlimited data - Mint Mobile
Minutes
Unlimited
Texts
Unlimited
Data
Unlimited
Price
$30/mo** $90 for 3 months Service
Editors Take
4.5 / 5
Plans
PlanMinutesTextsDataPrice

Mint Mobile 4GB Data

Unlimited

Unlimited

4GB

$15*

* $45 for 3 Months Service

Mint Mobile 10GB Data

Unlimited

Unlimited

10GB

$20*

* $60 for 3 Months Service

Mint Mobile 15GB Data

Unlimited

Unlimited

15GB

$25*

* $75 for 3 months Service

Mint Mobile Unlimited Data

Unlimited

Unlimited

Unlimited

$30*

* $90 for 3 months Service
Features
Benefits

Pros

  • Offers the latest phones with 0% finance

  • Prepay months in bulk for more savings

  • Reliable network coverage

  • Works with most GSM phones

Cons

  • No family plans

  • Minimum 3 months

Benefits

  • Operates on the nationwide T-Mobile network

  • 7-day money-back guarantee

  • Prepaid - no contract, credit check, or activation fee

  • Bring your phone or buy a Mint Mobile device

  • Keep your phone number

  • Using your phone as a mobile hotspot is permitted

  • Free calling to Canada & Mexico, affordable rates to 160+ other locations

  • Flat-rate international roaming available as an add-on feature

  • Customer service by phone on weekdays and weekends, 24/7 by virtual chat

Ting SIM Card - Best GSM plan for talk & text - TingTing SIM Card - Best GSM plan for talk & text - Ting
Minutes
Unlimited
Texts
Unlimited
Data
0 GB
Price
$10/mo** $5 extra per GB
Editors Take
4 / 5
Plans
PlanMinutesTextsDataPrice

Ting Unlimited Talk & Text

Unlimited

Unlimited

0GB

$10*

* $5 extra per GB

Ting 1GB Data

Unlimited

Unlimited

1GB

$15

Ting 5GB Data

Unlimited

Unlimited

5GB

$20*

* $5 Off for 6 Months

Ting Unlimited Data

Unlimited

Unlimited

Unlimited

$25*

* $20 Off for 3 Months

Ting 12GB Data

Unlimited

Unlimited

12GB

$30*

* $5 Off for 6 Months
Features
Benefits

Pros

  • Simple plans for light phone users

  • Customer service

  • Nationwide LTE and 5G coverage

  • Good selection of handsets

Cons

  • Not for the data hungry user

Benefits

  • Offers coverage on both Verizon and T-Mobile

  • Prepaid service - no contract, credit check, or start-up fees

  • Bring your GSM or CDMA phone - most devices are compatible - or buy one from Ting

  • Keep your current number

  • Tethering/mobile hotspot allowed, speeds limited to 3G for GSM tethering

  • Use your plan minutes to call 60+ international locations

  • International roaming capability (at surcharged rates)

  • Extensive customer service hours by phone, chat, or email

Good2Go Mobile SIM Card - Best GSM plan for seniors - Good2Go MobileGood2Go Mobile SIM Card - Best GSM plan for seniors - Good2Go Mobile
Minutes
Unlimited
Texts
Unlimited
Data
1 GB
Price
$7.50/mo** 50% Off for 3 Months
Editors Take
4 / 5
Plans
PlanMinutesTextsDataPrice

Good2Go Mobile 1GB Data

Unlimited

Unlimited

1GB

$7.50*

* 50% Off for 3 Months

Good2Go Mobile 3GB Data

Unlimited

Unlimited

3GB

$10*

* 50% Off for 3 Months

Good2Go Mobile Unlimited Talk & Text

Unlimited

Unlimited

0GB

$10

Good2Go Mobile 6GB Data

Unlimited

Unlimited

6GB

$15*

* 50% Off for 3 Months

Good2Go Mobile 10GB Data

Unlimited

Unlimited

10GB

$35

Good2Go Mobile 20GB Data

Unlimited

Unlimited

20GB

$45

Features
Benefits

Pros

  • 4G LTE coverage

  • No contract

  • No credit checks

Cons

  • No unlimited data options

  • No app interface

Benefits

  • Coverage on the nationwide AT&T & T-Mobile networks

  • Prepaid cell phone plans - no contract, credit check, or activation fee

  • Bring your own phone or buy a Good2Go Mobile phone

  • Mobile hotspot/tethering not supported

  • International calling to over 60 countries available as affordable plan add-on; calling to other countries via add-on calling card

  • Customer service available by phone 7am - 1am EST every day

Red Pocket SIM Card - Best GSM plan for kids - Red PocketRed Pocket SIM Card - Best GSM plan for kids - Red Pocket
Minutes
500
Texts
500
Data
0.5 GB
Price
$10/mo
Editors Take
4.5 / 5
Plans
PlanMinutesTextsDataPrice

Red Pocket 3GB Data

Unlimited

Unlimited

3GB

$10*

* 50% Off First Month

Red Pocket 500MB Data

500

500

0.5GB

$10

Red Pocket 10GB Data

Unlimited

Unlimited

10GB

$15*

* 50% Off First Month

Red Pocket 22GB Data

Unlimited

Unlimited

22GB

$20*

* 50% Off First Month

Red Pocket 50GB Data

Unlimited

Unlimited

50GB

$25*

* 50% Off First Month
Features
Benefits

Pros

  • Nationwide coverage

  • No contracts

  • Latest selection of phones

Cons

  • Account dashboard needs work

  • No 0% financing options on latest phones

  • Customer service

Benefits

  • Operates on all four networks - AT&T, T-Mobile, Sprint, and Verizon

  • Prepaid cell phone plans - no contract, credit check, or activation fees

  • Bring your own GSM or CDMA device and keep your phone number

  • Mobile hotspot/tethering allowed with your plan data

  • Free international calling to 70+ countries

  • Customer service available in English, Chinese, Filipino, and Spanish via chat or phone

US Mobile SIM Card - Best GSM carrier for tablet data - US MobileUS Mobile SIM Card - Best GSM carrier for tablet data - US Mobile
Minutes
0
Texts
0
Data
2 GB
Price
$10/moFree Starter Kit with code: MSPUSM
Editors Take
4.5 / 5
Plans
PlanMinutesTextsDataPrice

US Mobile Unlimited Talk & Text

Unlimited

Unlimited

0GB

$8

US Mobile 1GB Data

Unlimited

Unlimited

1GB

$12

US Mobile 5GB Data

Unlimited

Unlimited

5GB

$15

US Mobile 12GB Data

Unlimited

Unlimited

12GB

$20

US Mobile 18GB Data

Unlimited

Unlimited

18GB

$25

US Mobile 30GB Data

Unlimited

Unlimited

30GB

$30

US Mobile Unlimited Data

Unlimited

Unlimited

Unlimited

$45

Free Starter Kit with code: MSPUSM

Features
Benefits

Pros

  • Flexible, no contract plans

  • 24/7 customer service

  • 5G coverage available

Cons

  • No international calling

  • Phone selection

Benefits

  • Coverage on either the T-Mobile or Verizon network

  • Risk-free trial: Full refund within 14 days or before 1000 talk, text, or MB's is used

  • Prepaid - no contract, credit check, or activation fee

  • Bring your own GSM or CDMA phone or choose from a small selection of phones for sale

  • Keep your own phone number

  • Mobile hotspot use available as add-on option with unlimited data plans

  • International roaming plans available with eSIMs

  • Add-ons available for talk, text, and data, with rollover

  • 24/7 customer support

Compare cheap GSM carrier plans

CarrierNetworkMinutesTextsDataPrice
TelloT-MobileUnltdUnltd1GB$10
Mint MobileT-MobileUnltdUnltd4GB$15** $45 for 3 Months Service
US MobileVerizon & T-MobileUnltdUnltd12GB$20Free Starter Kit with code: MSPUSM
TingT-Mobile & VerizonUnltdUnltdUnltd$25** $20 Off for 3 Months
Ultra MobileT-MobileUnltdUnltd2GB$11** Extra 20% Off with code: MSP20

T-Mobile GSM carrier list

CarrierNetwork(s)
Boost MobileT-Mobile
Boom! MobileVerizon & T-Mobile
Consumer CellularT-Mobile
FreeUP MobileT-Mobile
Metro by T-MobileT-Mobile
Mint MobileT-Mobile
Red PocketAT&T, T-Mobile & Verizon
Republic WirelessT-Mobile
Simple MobileT-Mobile
Straight TalkT-Mobile, AT&T & Verizon
TelloT-Mobile
TingT-Mobile & Verizon
TracfoneVerizon, AT&T & T-Mobile
Ultra MobileT-Mobile
Unreal MobileAT&T & T-Mobile
US MobileVerizon & T-Mobile
Gen MobileT-Mobile
WingAT&T, Verizon & T-Mobile
Good2Go MobileAT&T & T-Mobile
Hello MobileT-Mobile
GoSmart MobileT-Mobile
LycamobileT-Mobile
Walmart Family MobileT-Mobile
Speedtalk MobileT-Mobile

AT&T GSM carrier list

CarrierNetwork(s)
Cricket WirelessAT&T
FreedompopAT&T
h2o WirelessAT&T
Pure TalkAT&T
Red PocketAT&T, T-Mobile & Verizon
Straight TalkT-Mobile, AT&T & Verizon
TracfoneVerizon, AT&T & T-Mobile
Unreal MobileAT&T & T-Mobile
WingAT&T, Verizon & T-Mobile
Good2Go MobileAT&T & T-Mobile
Black WirelessAT&T
easyGO WirelessAT&T
Airvoice WirelessAT&T
Optimum MobileAT&T

Cheap GSM plans FAQs

What's the difference between phone carriers?

MVNOs are low cost carriers that are powered by either T-Mobile, AT&T or Verizon. The main difference is the network each carrier uses as Verizon runs on CDMA, whereas T-Mobile and AT&T run on the GSM network.

Which is better CDMA or GSM?

It depends on your cell phone needs, as both technologies offer a similar service. It can be easier to switch phones or SIM cards with a GSM plan, especially when travelling, as GSM is a technology used worldwide whereas CDMA is used mainly in the US. CDMA phones are normally locked to a particular network, however most CDMA phones now work with GSM as well, due to the 4G LTE technology.

Which carrier is GSM?

There's a number of carriers that use GSM technology. T-Mobile MVNOs and AT&T MVNOs operate on the main networks so carriers like Ultra Mobile, Ting, and Mint Mobile use the GSM network.


Recap

MVNOs offer an affordable way to get access to the main US networks, with the same perks and quality coverage.

GSM (Global System for Mobile Communications) is one of two technologies that fills in the gap when 4G is not available. T-Mobile and AT&T both use GSM, along with their MVNOs.

If you're looking to bring your own phone you'll need to check it's compatible with a GSM carrier. You can do this with our IMEI checker. If your phone is a CDMA phone, not to worry, there are plenty of refurbished phones available at a discounted price or you can get a brand new phone from GSM carriers.

Rob Webber
Rob Webber

Rob has 15+ years experience in the US and UK running price comparison sites for cell phone plans, smartphone deals, TV, and internet. He loves thinking outside of the box to build tools that empower consumers to make more informed decisions.