With a custom firmware this radio can send off grid messages at very long distances and receive a far wider frequency range than intended. This is the Quansheng UV-K5(8). It is an extremely cheap dual band handheld radio, but unlike similar radios before it, this might be the most hackable radio.
Update: There is an even better firmware available by kamilsss655, which has all the same features as the ones described in this video, but also retains vox, fm radio and even includes message encryption, options for what encoding to use and lots more. Get it here: https://github.com/kamilsss655/uv-k5-firmware-custom
Link to the firmware I've used in this video JOAQUIMORG: https://github.com/joaquimorg/uv-k5-firmware-custom/tree/main/firmware
Get the latest version available in the folder and download the "packed" bin.
You can install it using the online flasher: https://egzumer.github.io/uvtools/
EGZUMER firmware (can be flashed directly from browser): https://github.com/egzumer/uv-k5-firmware-custom/releases
Custom version of CHIRP: https://github.com/egzumer/uvk5-chirp-driver/releases
UVMOD online patcher: https://whosmatt.github.io/uvmod/
0:00 Intro
0:53 Physical properties
1:47 Modded frequency range
2:32 Off grid messaging
4:22 JOAQUIMORG and EGZUMER firmware
5:02 Amateur Radio Licence
6:24 More Quansheng functionality
6:57 Programming with CHIRP
7:23 More custom mods
7:36 Normal radio operation
8:07 Outro
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