What happens if you send an SMS to a blocked WhatsApp number - briefly?
If you send an SMS to a blocked WhatsApp number, the message will not be delivered through WhatsApp but may still reach the recipient via their phone's standard messaging system if they have not blocked your number there as well.
What happens if you send an SMS to a blocked WhatsApp number - in detail?
When you attempt to send an SMS to a contact who has blocked your WhatsApp number, the message will not be delivered to their phone via WhatsApp. This is because WhatsApp uses end-to-end encryption and respects the user's decision to block a specific number. Here’s what happens in detail:
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Blocking Mechanism: When a user blocks another user on WhatsApp, it prevents any messages or calls from that blocked user from reaching them through the app. This includes text messages, media files, and even status updates.
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SMS Delivery System: WhatsApp itself does not handle standard SMS messages; these are managed by your mobile carrier's network. However, since the recipient has blocked your number on WhatsApp, any message sent through the app will not be delivered to their device via WhatsApp’s encrypted channels.
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Notification and Message Status: The sender will not receive a delivery confirmation or read receipt for the SMS sent to the blocked contact via WhatsApp. This is because WhatsApp does not transmit status updates or notifications for messages that are blocked from reaching their destination.
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Alternative Communication Channels: If you try to send an SMS through your phone’s native messaging app (not WhatsApp), and the recipient has not blocked your number on their phone, they will receive the message normally. However, if the recipient has also blocked your number on their device, then the SMS will likely be filtered out by their carrier or device settings, depending on their specific configuration.
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Carrier-Specific Features: Some carriers offer features that allow users to block certain numbers from sending SMS messages. If the recipient has used such a feature, your SMS will not reach them regardless of whether it was sent through WhatsApp or another messaging service.
In summary, if you send an SMS to a contact who has blocked you on WhatsApp, the message will not be delivered through WhatsApp's encrypted channels. It is important to note that blocking on WhatsApp does not affect standard SMS delivery unless additional measures have been taken by the recipient or their carrier.