“The first point to consider is which carrier has the best service where you live and work or spend much of your time,” say Jamie Huff and Tammy Parker, wireless analysts at Current Analysis. The quality of a provider’s network can vary drastically within the same city or metro area. To illustrate this difference, here’s what Verizon looks like next to T-Mobile in terms of nationwide speeds (the blue means faster data speeds detected; the orange indicates slower):
AT&T is a name we're all familiar with, a telecommunications behemoth whose history stretches back centuries. The company is a formidable player in the cell phone industry, especially when it comes to coverage: the breadth and reliability of the carrier's network is second only to Verizon's. This great coverage in one of the key benefits of going with AT&T for your next cell phone plan. 
After prodding Verizon to end overage fees with a nifty bit of skywriting in 2015, the “Uncarrier” T-Mobile played its trump card by switching all subscribers over to a single unlimited plan known as T-Mobile One. As of September 2018, all new subscribers receive unlimited talk, text, and 4G LTE data. And though “unlimited” is never truly unlimited, T-Mobile doesn’t start throttling speeds until you’ve hit 50 GB of data usage. It’s a generous limit at a great value — especially because video and music streaming won’t count toward that data cap. T-Mobile One costs $70 for one line, and each additional line is about $10 cheaper. T-Mobile prices include taxes and fees, while Verizon’s comparable 75 GB plan costs $95 before taxes and fees.

Sprint: Unlimited Basic includes talk, text and high-speed data in Canada and Mexico. You can add Sprint’s Global Roaming service to any Sprint plan at no additional charge. With Global Roaming, you get free texting and 2G data. Calls made abroad start at 20-cents-per-minute. You can purchase high-speed data passes to get LTE data download speeds abroad
Why we love it: If you rely frequently on your phone to provide a WiFi signal to your other devices, Boost Mobile's Unlimited HD plan is worth a close look. In addition to allowing you to skip a credit check and worries about extra taxes and fees (they're baked into Boost's prices), the plan gives you a whopping 20GB of full-strength hotspot data a month. This is a dream if you do frequent tethering.  
For years, cell phone carriers in the United States relied on technologies that were incompatible with those used in Europe, Asia and much of the rest of the world. Recently, two major U.S. cellular carriers -- AT&T and T-Mobile -- built nationwide networks based on Global System for Mobile communication (GSM) technology, the international standard for cell phone networks.
“The first point to consider is which carrier has the best service where you live and work or spend much of your time,” say Jamie Huff and Tammy Parker, wireless analysts at Current Analysis. The quality of a provider’s network can vary drastically within the same city or metro area. To illustrate this difference, here’s what Verizon looks like next to T-Mobile in terms of nationwide speeds (the blue means faster data speeds detected; the orange indicates slower):
Although prepaid and MVNO plans are cheaper, data is typically limited to around 3 GB; the highest cap we were able to find was 10GB. In other words, these plans are only going to work if you use very little data. You also won’t have access to lightning-fast load times or recently released smartphones. You’ll need to stick with a major carrier for either of these perks.
You can call over 200 countries and text to over 100 countries. View country list and codes or visit your local U.S. Cellular retail store or call 1-888-944-9400 (611 from your wireless phone). Country availability is subject to change. Messaging is available to certain wireless carriers' customers within a country. Please verify both country and carrier for messaging.

If you're not on an unlimited plan, Verizon offers a daily travel pricing option called TravelPass. It’ll cost you $5 per day per device for each day you’re out of the country if you travel to Mexico or Canada. In more than 100 other countries — including China, France and Germany — Verizon charges $10 per device per day. Talk, text and data on TravelPass are subject to the same allowances you have on your Verizon plan stateside; in other words, the data you use in Europe draws from the tiered data plan you have at home. Note that data speeds are only 4G for the first 512MB each day when you have a TravelPass; after that, you're throttled to 2G speeds.

Metro and Boost charge the same $30 to add extra lines to one of their data plans. That means a family of four would pay the same $140 a month for unlimited data on every line. We give the nod to Metro, because the network of its parent company T-Mobile performs better on our test than that of Boost parent Sprint. We also like its included Google One storage, though Boost offers more hotspot data with its plan.
RootMetrics strives to be as comprehensive as possible in its methodology, which includes testing reliability and speed during file uploads and downloads, while downloading email, and while downloading files similar to typical web pages. Testers also measure how reliably each network places and maintains calls and how reliably and quickly subscribers can send and receive text messages.
Voice-call quality has improved as three of the four carriers (Verizon, T-Mobile, and AT&T) have built out Voice over LTE (VoLTE) service and made it interoperable. (Sprint doesn’t plan to begin its VoLTE rollout until this fall.) And across the board, data caps have risen to reflect customers’ increased demand for data: All four major US carriers now offer unlimited data plans and have refrained from curtailing them since T-Mobile and Verizon’s late-2017 pruning of their unmetered deals.
Another option besides making a traditional cell phone call is using a Voice Over IP (VoIP) service such as Skype, which connects calls via an Internet connection. Skype can be used on a laptop, tablet or smartphone. Skype users can talk to each other for free, and can make calls to landlines and cell phones at affordable rates. However, remember that even if you’re not making international calls over your phone’s cellular network, you’ll still need to have an international plan in place to avoid exorbitant data charges (or find a free Wi-Fi connection so you don’t have to use your data).
2GB Plan: No discounts apply (except AutoPay discounts). Includes unlimited domestic Long Distance calling and texting. Third-party content/downloads are add’l charge. Includes selected allotment of on-network data usage for phone and mobile hotspot use and 100MB off-network data usage. Add’l on-network high-speed data allowance may be purchased at $15/GB. Mobile Hotspot Usage pulls from your data and off-network allowances. High-speed data is access to 3G/4G. Add’l $25 line/mo. applies with subsidized phone until the customer enters into a new device transaction that does not have an annual term service agreement.
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