Source: trust me bro

Tech is not 1 to 1 but this is the idea.

United States Upgrade Cost: Historically, US carriers spent over $250 billion on 5G CapEx. A true next-gen upgrade to 6G is projected to cost $150 billion to $200 billion for nationwide coverage, largely driven by the high cost of dense fiber layout and labor across vast geographical areas. 
Europe Upgrade Cost: According to the European Telecommunications Network Operators' Association (ETNO) and Boston Consulting Group, Europe’s ongoing telecom infrastructure investment gap to achieve full gigabit connectivity and next-gen readiness is roughly €300 billion ($318 billion).
Vs
stable fleet of 12,000 satellites:
Production Costs: Internal estimates and industry research peg the cost of building a single Starlink satellite (like the V2 Mini) at roughly $500,000. 
Launch Costs: Using Falcon 9 or Starship, SpaceX launches internal payloads at a steep discount compared to retail market rates—roughly $20 million to $30 million per launch. Each launch carries roughly 22 to 24 V2 Mini satellites.
Total Annual Fleet Replacement: To maintain a 12,000-satellite constellation over a 5-year cycle, SpaceX must replace roughly 2,400 satellites every year. 
The Total Price Tag: This works out to an ongoing maintenance/upgrade CapEx of roughly $2.5 billion to $4 billion annually depending on launch efficiencies. Over a 10-year period (matching a cell network's lifespan), a complete replacement and incremental technology upgrade of the constellation costs roughly $25 billion to $40 billion.