If you’ve tried to unlock your phone in the past but were told by your carrier that you couldn’t, you should try again. The Consumer Code for Wireless Service was implemented in February 2015, providing more freedom and flexibility to consumers when it comes to their cell phones. You can learn more about unlocking a phone or tablet from the Federal Communications Commission.
Some devices may automatically transmit and receive data without any user action or knowledge. This may result in significant unexpected cellular data charges. Applications such as push email, news and weather updates, location services and many downloadable apps (even free ones) may do this. This list is not at all exhaustive; therefore, to avoid unexpected bills, we recommend that you take great care to disable automatic applications on your device.
The difficulties I encountered are instructive as to what a prepay customer should understand bout service limitations when travel outside of the United States is contemplated. My experience also pointed to a glaring security problem for tracing criminals, terrorists, stalkers or others that seek to use their phone to facilitate illegal activities.
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.
The phone is perfect except for two weird things. One is that its country setting is rigged for Canada and there's no way of changing it. The other, more serious, is that putting a finger on the side above SD card somehow affects touchscreen functionality, though the problem will likely go away when I buy a protective case. All in all, a great bargain.
Bought this (Samsung j3 2016 international) for international travel using sim cards. Used it in Rwanda, Uganda and Tanzania. Was able to register and use it in each country, though usually had an issue using the internet directly on it and instead often employed it as a hot spot for my other phone (which is not otherwise compatible for international use). It worked great as a hotspot for internet and by itself for messaging, also worked great directly when there was wifi. Im not sure if the direct internet issues were with the service I bought, or some setting i had wrong, or with this phone itself, so cannot say. But it made connectivity possible and solidly reliable by acting as a mobile hotspot and I was traveling with both phones anyway, so to me that was not much of a problem, other than having to keep them ... full review
I LOVE this phone. I previously had an HTC Desire Eye and I loved that one so much that I was hesitant to get a new one, but it finally conked out on me. First, let me address some of the other reviews who say this phone doesn't support 4G/LTE. I'm in the US and I use T-Mobile/Metro PCS service. IT WORKS. The moment they turned on the service on this phone, the service and data worked like a charm. The service and speed are exactly the same as in my previous phone which was 4G/LTE and using the same carrier/service. The only difference is that the data indicator icon on the screen has an "H/H+" icon, but I think it's because the phone itself was programmed to work in Asia/Europe, but that's just my theory. The speed/service itself is still running on 4G/LTE. As for the performance ... full review

Verizon’s 5GB plan includes carryover data, which is good for 30 days. And you can nix overage charges by turning on Safety Mode, which drops you to 2G speeds when you hit your monthly high-speed limit. You can save $5 per month if you opt for paperless billing and automatic payments, but you can only use a checking account or debit card. This is a single-line plan, so you can’t add additional lines to make it a family plan.
Each call is priced at a per minute rate for international toll, plus airtime and applicable charges and taxes.  Rates vary, based on country called.  Per minute rates only available from a customer's local U.S. Cellular home calling area. U.S. Cellular per-minute rates are subject to change.  Taxes, long distance, toll, and other charges may apply.  Other restrictions and limitations may apply.  
Why we love it: T-Mobile's ONE family plan gives you 4 lines of unlimited data, Netflix subscriptions and unlimited hotspot usage (at 3G speeds)—all for $140 a month. Plus, it comes backed by T-Mobile's solid network. If you have a family full of data streamers and browsers, this plan is the way to go. Did I mention that all taxes and fees are included in this price? 
At UNREAL Mobile, get a 14-day trial of Unlimited Talk, Text, and Data + 5GB LTE (a $30 per month value) for free along with a 4G GSM 3-in-1 SIM Kit (a $15 value) for free. Pay only a one-time account setup fee of $0.01. Plus, free shipping applies (a $6.99 value). It works with most unlocked AT&T and T-Mobile GSM Android or iOS smartphones. Why get UNREAL Mobile?
With two sets of rate plans, Verizon’s higher costs make it less of a budget-friendly option though they do offer “go unlimited” as the lower tier that caps streaming video at 480p and cuts back mobile hotspot speeds. Their “beyond unlimited" plan adds 720p streaming video on phones and 1080p on tablets alongside 15GB of mobile hotspot use every month.
However, switching to prepaid, where you pay for service before you use it, can be an easy way to save $10 to $20 a month or more. Many prepaid services are provided by smaller companies that simply resell service from one of the big carriers, so they offer similar coverage as those carriers at a lower price. But for these resellers to undersell the major carriers while using those carrier networks, the resellers make some trade-offs; similarly, the major carriers’ own prepaid plans tend to involve restrictions their postpaid plans lack. We don’t recommend switching to prepaid unless you meet most of these criteria:

The one place where AT&T holds a competitive advantage is in its bundles. In mid-2015, AT&T merged with satellite TV provider DIRECTV, making bundling discounts available for the first time. In 2018, the DIRECTV live streaming service is paired with its unlimited phone plans, providing more than 30 live TV channels that you can stream on any platform.
Excluding plans that don’t let you bring your own device, Metro by T-Mobile, formerly MetroPCS, has the best rates for two-line scenarios—$70 for 5 GB each on two phones. That pricing easily beats T-Mobile’s own prepaid plans, and Metro by T-Mobile’s data caps exempt streaming video (at the cost of limiting its resolution to DVD-quality 480p resolution, although you can opt out of this Data Maximizer feature if you want).
Speed and capacity – When you really get down to it, the specs on the OnePLus 3T are mightily impressive. It comes with a Snapdragon 821 processor and 6GB of RAM as standard meaning functionality, and speed is fantastic. The basic (cheapest) model also comes with 64GB of storage, allowing you to take as many travel pics as you want without receiving storage notifications every 2 minutes.
Several prepaid carriers offer monthly plans with unlimited 4G LTE data, but Metro by T-Mobile remains the best, thanks to its superior network performance and perks. Metro gives you unlimited data for $50 a month, with 5GB of LTE hotspot data and access to Google One cloud storage. Upgrade to the $60 plan, and you get 15GB of hotspot data plus an Amazon Prime membership on top of Google One. That tops Boost's similarly priced unlimited plans, though Boost does offer more hotspot data, and you can get HD video streaming with its $60 plan.

If you need better connectivity to, say, hail a Lyft from the Acropolis, simply add a global package to your current service. It's shockingly easy. For example, AT&T offers a service called Passport, which gets you 200 MB of data and unlimited texting in more than 200 countries for just $40 tacked onto your current monthly plan. (Calls abroad still cost a buck a minute, so talk quickly.) Verizon offers a similar service, Travel Pass, that costs $5 a day to extend your plan to Mexico and Canada and $10 per day for service in more than 100 other countries. How much data you need depends upon how active you plan to be online. Posting 30 photos to social media costs about 10 MB; each web page you visit costs about one. Downloading apps like Whatsapp lets you send texts and make calls without racking up minutes, and disabling "automatic refresh" on email and other apps helps avoid blowing through your data allowance.
Verizon has shuffled up its unlimited plans, and that has an impact on people who like to use their data plan while traveling. Go Unlimited and Beyond Unlimited subscribers both enjoy unlimited talk, text and data for no additional charge in Mexico and Canada. However, while calls and messages are truly unlimited, data will be throttled from LTE to 2G speeds after 512MB.

Verizon’s best plan for most people is also its least obvious offering: the 5 GB for $55 deal. It’s difficult to find this plan on Verizon’s homepage, but you should see this option if you select a phone, add it to your cart, and scroll past Verizon’s flagship “unlimited” offerings when selecting a plan. (Verizon’s website quotes a $60 rate for this plan, but signing up for auto-pay using a checking account or debit card gets you $5 off—though this precludes running up points on a travel-rewards credit card).


Most major U.S. phone companies give you the option of choosing a plan that allows you to make calls, send texts and access data while traveling abroad. These plans may be offered on a daily basis or as a temporary service that you can set up for a single month when you know you’ll be leaving the country. Each company offers different plans for various prices that work for a number of phone models and in designated countries. Per-minute calling rates vary for different countries.
After the distraction of two self-inflicted wounds (a doomed purchase of its smaller competitor Nextel, followed by the wrong choice of 4G technology before a belated pivot to LTE), Sprint is finally making substantial progress with its network. If its coverage works for you, its pricing is almost as cheap as that of many prepaid and MVNO services but provides higher data allotments—and Sprint’s incentives to customers who bring numbers from other carriers allow even greater savings. However, as with Verizon, its CDMA technology permits simultaneous voice and data only if you’re on LTE.
Bought this (Samsung j3 2016 international) for international travel using sim cards. Used it in Rwanda, Uganda and Tanzania. Was able to register and use it in each country, though usually had an issue using the internet directly on it and instead often employed it as a hot spot for my other phone (which is not otherwise compatible for international use). It worked great as a hotspot for internet and by itself for messaging, also worked great directly when there was wifi. Im not sure if the direct internet issues were with the service I bought, or some setting i had wrong, or with this phone itself, so cannot say. But it made connectivity possible and solidly reliable by acting as a mobile hotspot and I was traveling with both phones anyway, so to me that was not much of a problem, other than having to keep them ... full review

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I write about all things "cyber" and your right to privacy. Before joining Consumer Reports, I spent 16 years reporting for The Associated Press. What I enjoy: cooking and learning to code with my kids. I've lived in the Bronx for more than a decade, but as a proud Michigan native, I will always be a die-hard Detroit Tigers fan no matter how much my family and I get harassed at Yankee Stadium. Follow me on Twitter (@BreeJFowler). 
Sprint Unlimited 55+ Plan: Reqs. new account activation. Acct holder must be 55 or older. 2 line max. Includes unlimited domestic calling, texting & data with 3G Mobile Hotspot VPN & P2P data. Discounted phones subject to add'l $25/mo./line. Third-party content/downloads are add’l charge. Plan not avail. for tablets/MBB devices. Select Int’l svcs are included see sprint.com/globalroaming.
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