Why does LTE work on the iPhone but 4G is incredibly slow, even with five bars?

Why does LTE work on the iPhone but 4G is incredibly slow, even with five bars?

LTE is 4G. Some carriers have (& possibly still do) treat them as separate things.

Also it may depend on which iPhone you are referring to as well as which carrier is involved.

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Because Verizon became unlimited and too many people are using the bandwidth

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