It's hit or miss in my experience. My first Baofeng was well behaved as far as RF interference, but it was so shoddily built that it literally fell apart on me

It's hit or miss in my experience. My first Baofeng was well behaved as far as RF interference, but it was so shoddily built that it literally fell apart on me a couple of years into ownership (the battery latch, belt clip, and TX button all broke within a week of each other). My second Baofeng was more physically sound but had issues with RF harmonics on UHF so it was useless on the band I wanted it for. I've since gotten a Radioddity DMR handheld and it's both physically and functionally sound. It cost the same as four Baofengs but it's worth it, not to mention the ability to talk on DMR groups.