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  4. What are all the error codes, and what does it mean?

Error Codes:

Invalid Parameters:
Error Code Description
202 Invalid mobile number
203 Invalid sender ID
207 Auth key invalid
208 IP is black listed
Error Code Description
301 Userdoes not have sufficient balance to send SMS
302 Expired user account
303 Banned user account
306 This route is currently unavailable
307 Schedule time is Incorrect
308 Campaign name cannot be greater than 32 characters
309 Selected group(s) does not belong to you
310 SMS is too long. System paused this request automatically
311 Error 311 occurs when same SMS content is sent to the same number within 10 seconds. This is a security feature used to avoid multiple delivery.
The first SMS will be delivered and the second will be rejected. The balance will also be deducted only once.

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