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What is a zero-byte session?

A zero-byte session occurs when a device starts a data session but transmits no user data.

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Written by Customer-Success
Updated over 4 weeks ago

Environment

  • Onomondo App: Network Logs

  • Device: Applicable to all

Question

  • What is a zero-byte session?

  • Why does my device open data sessions but not transmit any data?

Answer

A zero-byte session refers to a mobile data session established by a device without any payload (user) data being exchanged.

  • The session is technically live, but it does not serve any data transmission.

  • Both Upload and Download remain at 0 bytes in such cases.

Cause

Zero-byte sessions are often the result of applications initiating mobile data sessions without following through with data transfer. This could be due to:

  • Firmware design that checks connectivity without actual data exchange.

  • Server endpoints failing to respond or accept data.

  • Application logic errors.

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