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2 way SMS Campaigns



2 way SMS Campaigns can look easy but it is a daunting task of verifying who is behind the phone of the recipients. Phone numbers can change and needs to be verified of who you are sending the message to is actually who they are.


We had a project to build a 2 way SMS Campaign to send its loyal customers $40 e-vouchers via SMS provided the below criteria are met:

  1. Send out a promotional SMS from a list of database

  2. Verify the SMS recipient by them responding with their last 6-digit NRIC number

  3. If the recipient's number matches the 6-digit NRIC number, AND

  4. The recipient has never redeemed the e-voucher, THEN

  5. Send an SMS with the promotional code of $40 for the recipient to redeem at a shop

  6. If the recipient's number does not match the 6-digit NRIC number, send another SMS saying that verification failed, please call the customer service number

  7. If the recipient has already redeemed the e-voucher and is doing it for the second time, send an SMS saying that the voucher has been redeemed.

Below are the sample scenarios we have built for the client:


Flow 1





  1. Send SMS from the list from the database

  2. 2 way SMS Keyword is "LI"

  3. Wait for reply

  4. Checks mobile number with NRIC responded

  5. If mobile number = last 6 digit NRIC & e-voucher is not redeemed

  6. Send congratulatory message with e-voucher for them to redeem.











Flow 2






  1. Send SMS from the list from the database

  2. 2 way SMS Keyword is "LI"

  3. Wait for reply

  4. Checks mobile number with NRIC responded

  5. If mobile number is not equal to last 6 digit NRIC

  6. Send apology SMS












Flow 3


  1. Send SMS from the list from the database

  2. 2 way SMS Keyword is "LI"

  3. Wait for reply

  4. Checks mobile number with NRIC responded

  5. If mobile number is equal to last 6 digit NRIC BUT has already redeemed the e-voucher

  6. Send SMS that e-voucher has already been redeemed.













If you are looking at a 2 way SMS or WhatsApp Campaign to send promotional e-vouchers, please feel free to give us a call. Our WhatsApp Business agents are always ready to help you out.

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