Both LTE and HSPA+ are defined by the ITU as “4G” networks. The decision to display “4G” and “LTE” on phones (not just the iPhone) is largely a marketing decision . LTE is 4G. 4G is not necessarily LTE.
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C DM said: Realistically speaking 4G is LTE (in general and in most parts of the world). In US at least some carriers, especially in relation to the iPhone, have taken 4G to be somewhat different applying it to what’s more along the lines of 3.5G (and not LTE).13 Ara 2018
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