The best way to see how much data you’re using is to check with your carrier, either through its website or through its app. Both Android and iOS provide estimates of your current data use, and those numbers can be useful if you’re trying to see which of your apps use the most data, but your carrier’s website will give you a more accurate, reliable number (and that’s the number that it’ll use when calculating your bill, anyway).
Yes. If you place an international call from the areas located in your home 'footprint', then the call will be billed at the U.S Cellular per minute rate for international toll, plus airtime and applicable charges and taxes. If you are roaming and place an international call with another carrier, you will have access to the countries available through that carrier. The call will be rated according to the International toll rates charged by that carrier, plus airtime and applicable roaming charges and taxes.
If saving money without compromising too much on data is the most important thing to you, Republic Wireless offers a decent amount of data for less than $30 a month, especially after tweaking what it charges for LTE data. Otherwise, Verizon offers the most compelling individual cellphone plan, costing $55 a month for 5GB; you can also roll over unused data to the next month. Metro by T-Mobile — the new name for the old MetroPCS service — still offers the best prepaid plans for both individuals and families thanks to a strong network and appealing perks.
As pricey as Verizon's Above Unlimited plan may be, it could be worth it if business takes you overseas on a monthly basis, thanks to the addition of some complimentary TravelPasses. For infrequent travelers taking short trips, programs like Verizon’s TravelPass or AT&T’s International Day Pass will likely be good enough. But again, T-Mobile offers the most appealing international coverage, especially once it launches its $5 On Demand Pass in August.