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answers.yahoo.com/question/index?qid=20110525123213AApL6IR

It depends on the phone. If you have a GSM straight talk phone, the phone will use AT&T's towers. If it is a CDMA phone, it will use Verizon's towers. Keep in mind that the coverage will likely be equivalent to the AT&T or Verizon prepaid networks, not their full, contract networks.

www.signalbooster.com/pages/what-are-the-cellular-frequencies-of-cell-phone...

New 4G FDD LTE and 4G TDD LTE Frequencies included in select 4G signal boosters.. 4G FDD LTE Frequencies: B1 (2100) is Band 1 on 2100 MHz. B2 (1900) is Band 2 on 1900 MHz. B3 (1800) is Band 3 on 1800 MHz.

get.straighttalk.com/keep-your-own-phone

Straight Talk’s Keep Your Own Phone plan requires a compatible, unlocked phone, activation kit and Straight Talk unlimited service plan. User may need to change the phone’s Access Point Name Settings. Straight Talk reserves the right to terminate your service for unauthorized or abnormal use.

clark.com/technology/charter-spectrum-mobile-cell-phone-service

2. Network Coverage Spectrum Mobile is a mobile virtual network operator (MVNO) that partners with Verizon to provide its customers with unlimited access to the nation’s largest LTE network. 5G service is now available.. In addition, users can connect to Spectrum’s Wi-Fi hotspots across the country to reduce their monthly data usage.

www.reference.com/world-view/carrier-tracfone-use-ba86edce27b5caba

Instead, they purchase airtime privileges from the major carriers who do. The way in which a carrier is determined for pre-paid phones is determined by the inner workings of the phone and how the phone connects to a network. Most cellular phones use sim cards. A sim card is a very small chip that contains all of a phone's information.

www.techwhoop.com/update-straight-talk-phone-signal

Straight Talk is another child of Tracfone and Walmart. It’s a Mobile Virtual Network Operator (MVNO) offering both CDMA and GSM support. The CDMA network uses Verizon’s, or Sprint’s CDMA 1xRTT wireless networks and the GSM side makes use of either T-Mobile’s or AT&T’s GSM networks.. Straight Talk is only available via Walmart, or you can buy it directly from its own website.

www.t-mobile.com/coverage/coverage-map

Now that Sprint is part of T-Mobile, our network is bigger and better than ever. Explore our 5G and 4G LTE coverage map and check availability in your area!

www.consumercellular.com/Coverage

See where wireless talk and data coverage is provided in the United States with our coverage map. ... Like all other coverage, coverage in these areas can be adversely affected by distance from cell site, network changes, weather, foliage, tower congestion, and other factors. Consumer Cellular utilizes multiple wireless networks. We have ...

www.wilsonamplifiers.com/blog/finding-cell-tower-locations-the-complete-guide

A cell tower, also known as a cell site, or a Base Transceiver Station, is a structure that produces cellular signal as a “cell” in a cellular network. This is accomplished with a myriad of transceivers, digital signal processors, control electronics, primary and backup electrical power, and GPS receivers.

www.straighttalk.com/wps/portal/home/shop/serviceplans

"Up to half the cost" is based on a comparison of the monthly cost of the $45 Straight Talk Unlimited Plan and the monthly cost of comparable no-contract, single line plans with unlimited talk, text and data on the top two carriers.