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.


Can I use my AT&T phone with another carrier?

Is AT&T a CDMA or GSM network?

By Rob Webber - Last updated on

AT&T is a GSM network carrier and works with GSM cell phones.

GSM stands for Global System for Mobile Communications. GSM and CDMA are the 2 types of 3G networks that cell phone carriers use to provide your service.

Compare cheap AT&T plans in your area

In the past, you couldn't use a CDMA network's phone on the GSM network and vice versa. However, most newer smartphones can operate on either type of service.

Some older phones can as well, just make sure you research your specific device to find out whether it's compatible with both before buying a cell phone plan.

Compare cheap AT&T plans in your area

AT&T GSM network carriers

If you're shopping around for a new carrier, consider MVNOs - Mobile Virtual Network Operators. These are smaller mobile providers that rent space on the same networks the big guys use and then sell it to you at a lower price.

There are plenty of great AT&T MVNOs to choose from, such as PureTalk, h20 Wireless and Red Pocket which means you can get AT&T service without paying AT&T prices.

AT&T vs H2O Wireless comparison

Keep your AT&T phone, number & coverage: Save $540 per year

CarrierNetwork Coverage4G/5G DataPriceAnnual Cost
AT&TAT&T 4G & 5GUnltd*$75/mo$900/yr
H2O WirelessAT&T 4G & 5G6GB$30/mo$360/yr
*Don't waste money on unlimited data - Avg. data usage is only 3-5GBSavings$45/mo$540/yr

AT&T GSM low-cost carrier benefits

  • Get the same great service: You get cell phone service on the very same networks the major providers use.
  • Save over half: MVNO plans typically save you 50% or more over the big three carriers.
  • Custom plans: Only pay for what you actually need and use.
  • No contracts or credit checks: No commitment and everyone is welcome!
  • Keep your phone: Most MVNOs are BYOP (bring your own phone) - keep your device and your number.

AT&T GSM carrier plans

Boost Mobile 5GB plan5GB$5** 66% Off for 3 Months
Good2Go Mobile 6GB plan6GB$15** 50% Off for 3 Months
Unreal Mobile 12GB plan12GB$20** Buy 2 Months Get 1 Free
Boost Mobile unlimited data planUnltd$25
Red Pocket 100GB plan100GB$50

AT&T GSM unlocked phones

You can also save a bundle on your smartphone by purchasing a used or refurbished GSM phone to go with your new plan.

Bring your own AT&T GSM phone to a cheaper carrier

  • Save half or more off retail: For less than half the price you can get a smartphone model just a year or two old.
  • It's a great value: Most model years only see minor tweaks to existing smartphone designs. Get a steal of a deal without sacrificing the features you love.
  • Keep your freedom: Buying your phone outright means you can leave your carrier any time you want - like when you find a cheaper cell phone plan.

AT&T GSM companies list

H2O WirelessAT&T
Red Pocket MobileAT&T, Sprint, T-Mobile, Verizon
Straight TalkAT&T, Sprint, T-Mobile, Verizon
TracFoneAT&T, Sprint, T-Mobile, Verizon
Consumer CellularAT&T, T-Mobile
FreedomPopAT&T, Sprint
FreeUP MobileAT&T
Net10AT&T, T-Mobile, Sprint, Verizon
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.