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This guide gets you from zero to sending your first SMS. Choose the path that matches your situation:
If you already have a phone number and credentials from an SMS provider (Infobip, Twilio, CM, etc.), you can start sending in minutes.

Prerequisites

A Trackly SMS account (sign up here)
A verified phone number from your SMS provider
Your provider API credentials (API key, auth token, etc.)

Step 1: Create a Sending List

A sending list connects a phone number to its SMS provider so Trackly can send through it.
1

Navigate to Lists

From the sidebar, click Lists
2

Create a new list

Click New List in the top right
3

Configure your list

Fill in:
  • Name: A descriptive name (e.g., “Brand A - Marketing”)
  • Phone Number: Your number in E.164 format (e.g., +14155551234)
  • Provider: Select your SMS provider
  • Provider Credentials: Enter your API key, auth token, or product token depending on the provider
FieldWhere to find it
API KeyInfobip dashboard > API Keys
Base URLYour Infobip API endpoint (e.g., xxxxx.api.infobip.com)
FieldWhere to find it
Account SIDTwilio console > Account Info
Auth TokenTwilio console > Account Info
FieldWhere to find it
Product TokenCM dashboard > Channels > SMS
4

Save

Click Create List

Step 2: Add a Test Contact

1

Navigate to the list

Click into the list you created
2

Add a contact

Click Add Contact and enter your personal phone number for testing. Make sure the number is in E.164 format (e.g., +14155559999).

Step 3: Create a Creative

Creatives are reusable message templates.
1

Navigate to Creatives

From the sidebar, click Creatives
2

Create a new creative

Click New Creative and write your test message:
Hello from Trackly SMS! This is your first test message.
The character count and segment count update as you type.
3

Save

Click Create Creative
SMS messages are limited to 160 characters per segment (70 if using special characters). Longer messages are split into multiple segments and reassembled on the recipient’s phone.

Step 4: Send Your First Message

1

Navigate to Schedules

From the sidebar, click Schedules
2

Create a schedule

Click New Schedule and configure:
  • Name: “First Test Send”
  • Sending List: Select your list
  • Send Mode: Blast
  • Schedule Type: One-time, Send Now
3

Add a message variant

Click Add Variant, select your creative, and set the audience percentage to 100%
4

Select audience

Select All Contacts (your test number)
5

Send

Click Schedule to queue the message
You should receive your test SMS within seconds.

Next Steps

Send First SMS

Follow the step-by-step quickstart

Authentication

Set up your API key

Troubleshooting

  • Check that the contact’s phone number is in E.164 format (+1...)
  • Verify your sending list’s provider credentials are correct
  • Check the message status in the Schedules view
  • Ensure the contact is subscribed (status: active)
  • Double-check your API key, token, or secret
  • Ensure your provider account is active and has sending credits
  • Verify the phone number is registered with your provider
  • Read the rejection reason on the Number Requests page
  • Common issues: missing opt-in proof, unclear use case, no website
  • Update your landing page and screenshots, then resubmit
  • Contacts who reply STOP are automatically unsubscribed
  • Check the contact’s subscription status in the list view
  • Re-subscribe the contact if this was a test number