What happens if you make a call on WhatsApp - briefly?
When you make a call on WhatsApp, the app uses your device's internet connection to establish a voice or video call with another user. The call is encrypted end-to-end, ensuring that only the participants can access the communication.
What happens if you make a call on WhatsApp - in detail?
When you make a call on WhatsApp, a complex series of events occurs to ensure seamless and secure communication between parties. The process begins when the user initiates the call by selecting the recipient from their contact list or entering the phone number directly into the search bar.
Once the call button is pressed, WhatsApp immediately establishes a connection with its servers. This initial step involves sending a request to the server, which then identifies and locates the recipient's device based on the registered phone number. Simultaneously, an end-to-end encryption key is generated for the session, ensuring that only the communicating devices can access the content of the call.
Upon establishing a connection with the recipient's device, WhatsApp sends a notification to alert them about the incoming call. If the recipient accepts the call, their device begins transmitting audio data packets through the internet. These packets contain compressed voice data that is sent in real-time to ensure smooth conversation flow.
During the call, WhatsApp continuously monitors network conditions and adjusts the quality of the audio stream accordingly. This includes adapting to varying bandwidth availability and optimizing the transmission rate to prevent interruptions or delays. Additionally, background noise reduction algorithms are employed to enhance the clarity of the conversation by filtering out unwanted sounds.
Throughout the call, the end-to-end encryption protocol remains active, safeguarding the privacy of the communication. Even WhatsApp itself cannot access the content of the call, ensuring that sensitive information is protected from unauthorized access or interception.
When the call ends, either party can simply press the hang-up button to disconnect. At this point, WhatsApp stops transmitting audio data and terminates the encryption session. The call history is then updated on both devices, reflecting the duration and status of the conversation for future reference.