Channel could not find To address

ERROR: 63003

PROGRAMMABLE SMS

ERROR

Description

You have tried to send a message to a To address that is inactive or invalid.

Possible Causes

The To address is no invalid or longer belongs to a mobile user
The To address was entered or formatted incorrectly

Possible Solutions

Ensure you have provided the correct To address for the user you are trying to reach
Ensure that the To address is still active

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