I’m not sure how you’re measuring the differences between cell phones and “personal radio communication” here. Cell phones are personal devices built around 3-5 different kinds of radios.
If you’re contrasting it with the HAM/Shortwave community, there’s an obvious difference in transmission power. The Electromagnetic Spectrum is a public resource we have to share intelligently. All the core tech in a cell phone is about how to use spectrum efficiently, delivering high speeds with minimal interference. Shortwave is much less sophisticated and operates at much higher power. There are real costs to amateur radio enthusiasts blasting transmissions with incorrectly configured equipment.
If you’re contrasting it with the HAM/Shortwave community, there’s an obvious difference in transmission power. The Electromagnetic Spectrum is a public resource we have to share intelligently. All the core tech in a cell phone is about how to use spectrum efficiently, delivering high speeds with minimal interference. Shortwave is much less sophisticated and operates at much higher power. There are real costs to amateur radio enthusiasts blasting transmissions with incorrectly configured equipment.