Unlimited is a myth
The Invisible Wall: Prioritization vs. Coverage
Most travelers look at a coverage map and see a sea of solid color. They think, “I’m covered.” But in the U.S., coverage is binary—you either have it or you don’t. Capacity, however, is a spectrum.
When you’re in a crowded terminal at JFK or walking past Radio City Music Hall, the towers are screaming. In these moments, the networks perform Traffic Triage.
Tier 1: Post-paid flagship customers (The locals paying $90/month).
Tier 2: Major MVNOs and high-priority prepaid.
Tier 3: Roaming IoT and "budget" travel eSIMs.
If your eSIM is Tier 3, you have a full 5G icon, but your data packet is sitting in the back of the line. Your "fast" connection is technically active, but functionally useless.
The Latency Trap: The "Home Routing" Problem
This is the "quiet killer" mentioned earlier. Many global eSIMs route your data back to a server in Europe or Asia before sending it to the U.S. website you’re trying to visit.
The Result: Even with 500Mbps download speeds, your Maps takes 10 seconds to find a coffee shop because the Latency (the round-trip time) is 300ms+.
The Goal: You need an eSIM with Local Breakout. Your data should stay in the U.S. to ensure "snappy" performance.
Who Actually Holds Up?
Based on our 2026 stress tests across NYC, LA, and Chicago:
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