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 bytesin 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. 

