OpenSignal app lets you check whether Verizon, AT&T, Sprint or T-Mobile has the best 4G LTE coverage in your area

Choosing the right carrier could be a difficult task: you've probably all seen the alluring new offers by T-Mobile, and Sprint has also been improving its network a lot lately, but will these two carriers provide adequate coverage in your area? And what about AT&T and Verizon Wireless, which one has better 4G LTE coverage?

Those are essential questions that you will want answered before making your carrier choice, and they are particularly important if you move to a new place, where you don't know that well what areas carriers cover.

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