5G Origins and Promises (2015)

• 5G finalized in 2015 by Samsung, Qualcomm, Nokia collaboration
• Three key pillars defined for next mobile standard:
  • Much faster speeds: millimeter waves vs 4G frequencies
    • 4G max: ~100 megabits/second
    • 5G promise: 20 gigabits/second (200x faster)
  • More capacity: 100x more data traffic capacity before overload
    • Support Internet of Things, smart cities
    • Every device (cars, washing machines, toothbrushes) connected
  • Zero latency: response time reduction
    • 4G: ~90 milliseconds
    • 5G promise: <1 millisecond (100x improvement)

Promised Applications

• Real-time augmented reality at sports events
• Stats hovering above players, instant updates
• Metaverse with no delay for virtual interactions
• High-precision remote operations:
  • Medical robot control from other side of world
  • Coordinating hundreds of drones in formation
  • Self-driving cars with split-second response times

Current Reality and Problems

• Cost increases:
  • Personal example: £30/month vs £20 for 4G
  • Some contracts up to £120/month
• Poor connectivity: US users spend <1% time on true 5G millimeter wave (2021)
• Marketing disconnect: providers claim users are "5G ready" when 5G isn't ready

Marketing and Consumer Mismatch

• Unlike previous generations (2G, 3G, 4G), consumers didn't need 5G
• 4G already met consumer needs for content consumption
• Companies had to "shoot for the moon" with ambitious claims
• Wrong focus: consumers wanted reliable connection, not extreme speeds
• Reality: medium-slow connection 99.5% of time, ludicrously fast 0.5% of time

Hypothetical Use Cases vs Reality

• VR anywhere: impractical for safety/social reasons
• Smart city drones: surveillance concerns
• Remote surgery: patients prefer doctors physically present
• Companies overestimated adoption timeline for future scenarios

Political and Infrastructure Challenges

• Three main 5G suppliers: Nokia, Ericsson, Huawei
• Huawei ban: US accusations of spying
  • Active removal of existing Huawei 5G components
  • Allied countries followed suit
• Anti-5G movement: physical destruction of towers due to cancer fears
• 5G infrastructure actually went backwards during this period

Fundamental Technical Problem: Range

• High frequency limitation: millimeter waves barely travel, blocked by everything
• Building interference: full connection to 2 megabits when stepping behind building
• Infrastructure requirements: beacon on every street corner with fiber optic cabling
• Rural impossibility: uneconomical for low-density areas (30 people per station)

Current 5G Definition Broadening

• Two types now included:
  • True millimeter wave (sci-fi possibilities)
  • Sub-6 waves (tweaked 4G infrastructure, marginally faster)
• Personal test results: 5G area showed <5 megabits/second (3G limit: 7 megabits/second)
• 5G logo has "practically no bearing" on actual speed/reliability

Market Impact and Future

• Downward spiral: confusion reduces investment in future use cases
• Meta struggles: cutting back spending due to hesitation
• Recommendation: save money, buy 4G device/contract for most users
• Coverage reality: only 0.2% of planet gets proper millimeter wave connection
• 5G may eventually be great, but current premium devices will be redundant by then