I see your point in general - but not all operators use B20 - here i.e. Tele2 uses exclusively B3 for LTE coverage and people I know who use it don't have any issues using it nationwide, even in rural or coastal areas (I have a holiday house in a remote area and 4G signal is excellent). And must admit I don't get the story about a guy throwing his phone for what - having only 3G signal at sea instead of 4G? - that's a sign of some mental issue, not of flawed phonemakers policy...
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