- When I make a call with phone caller, I have to hear mandatory government messages like "Covid-19 ...", "Don't reveal OTP...", etc. No such messages are imposed on me in a WhatsApp call.
- Some operators don't have VoWiFi in some areas. So if the network signal is weak, my call quality deteriorates. WhatsApp automatically prefers WiFi.
- With phone caller, I am billed based on criteria like receiver's network operator, receiver's country, call duration, etc. WhatsApp is free on WiFi. Even without WiFi, I only pay minor data charges with WhatsApp.
- A WhatsApp call can be upgraded to a video call in the middle of discussion. This is impossible with a normal phone call.
I have also stopped sending SMS' from my phone; instead, I use WhatsApp chat feature because
- I get billed for every SMS. Even if I purchase some unlimited pack, I will get billed on exceeding some limit and sending SMS to different country. WhatsApp chat messages are always free (only data charges apply).
- With SMS, I don't get to see when the other person has read my SMS. With WhatsApp, I get to know when the other person has received my message and when he/she has read it.
- A WhatsApp chat can contain pictures, audio, video, etc. This is impossible with traditional SMS.
The Phone and SMS apps are outdated; long live apps like WhatsApp.
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