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Why were the passengers on 9/11 hijacked flights able to call their loved ones on cell phones in the air before the crashes, but my modern cell phone loses all service pretty much instantly after t…

Mark Sterling
Mark Sterling
Research Editor · Apr 1, 2026 · Updated Apr 13, 2026

I believe the passengers were using those clunky old airplane phones in the seat backs. You'd just slide your credit card through and get a few minutes of not-especially-great service.

30
Words

1 min
Read Time

#424
of 500 in Science

-58%
vs Category Avg

The Short Answer

I believe the passengers were using those clunky old airplane phones in the seat backs. You'd just slide your credit card through and get a few minutes of not-especially-great service.

Analysis

Key Concepts: Believe, passengers, using

This explanation focuses on believe, passengers, using and spans 30 words across 2 sentences. At 58% below the average Science explanation (72 words), the answer takes a direct, no-frills approach — sometimes the simplest explanation is the most effective.

What This Answer Covers

This is a focused, single-point answer that gets directly to the core of the question without detours.

How This Compares in Science

Ranked #424 of 500 Science questions by answer depth (top 86%). This is a brief primer — the answer is intentionally short. For questions with a single core mechanism, brevity can actually be a strength.

Frequently Asked Questions

Is there a simple explanation for why the passengers on 9/11 hijacked flights able to call their loved ones on cell phones in the air before the crashes, but my modern cell phone loses all service pretty much instantly after takeoff.?

I believe the passengers were using those clunky old airplane phones in the seat backs. You'd just slide your credit card through and get a few minutes of not-especially-great service.

How detailed is this explanation compared to similar Science questions?

This is a brief answer at 30 words, ranked #424 of 500 Science questions by depth. The key concepts covered are believe, passengers, using.

What approach does this answer take to explain the passengers on 9/11 hijacked flights able to call their l?

The explanation uses direct explanation across 30 words. It is categorized under Science and addresses the question through 1 analytical lens.