I have recently purchased a couple of Baofeng F8HP talkies and was expecting to get a bit more range out of them. I was only able to get about 800meters in good conditions. Is there a way to get better distance on the frs or gmrs channels.?
If you could define "good conditions", it might help.
In heavily urban areas, hilly terrain, indoors, etc. 800 meters wouldn't be unexpected.
Out in the open, flat lands, etc. you ideally should be seeing more.
It's all about the antenna, but if you are down low, then UPMan is giving you good advice. Antenna height is important.
UHF tends to be mostly line of sight. If the two antennas can see each other, you can usually communicate. If there is a lot of "stuff" in the way, steel, concrete, metals, dirt, etc. then you will have issues.
Not sure if you are in a car, home, outdoors, or what, so hard to give good advice.