They changed the RF chip at least once. That could be one reason.
It could be the default settings changed in different firmware versions.

Tom ND5Y

On 1/16/20 6:49 AM, Amnon Zohar wrote:
> On older uv-5r the default range for vhf was 136-174. Now some show 130-179!
> Does older models support shorter range or is it just different default
> settings and all support 130-179(or more?)
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