Helpful Guides and Resources
Practical, up-to-date guides on DLT compliance, sender IDs, message types, API integration and getting more from every bulk SMS campaign in India.
All guides
TRAI DLT registration for bulk SMS, step by step
Entity, header and template registration, the 2024-25 message traceability rules and the new -P/-S/-T/-G header suffixes, explained step by step. Plus free DLT help from our team.
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Reasons to use a bulk SMS service
Near-universal reach with no app needed, fast open rates, regional languages and low cost. Why bulk SMS is still the most dependable way to reach customers across India.
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Promotional vs transactional SMS
What promotional, service and transactional SMS are, which reach DND numbers, the sending hours for each, and ready-to-use DLT template examples.
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How to choose an SMS sender ID (header)
The 6-character format, brand naming, DLT registration and the new category suffixes. How to pick a sender ID that gets approved first time and that customers recognise.
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Website SMS integration with HTTP API
What an SMS HTTP API send looks like, how to read the response and delivery report, and the DLT registration you need before the first message goes out.
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SMS character limits: plain text vs Unicode
Why a single SMS is 160 characters in plain text but only 70 in Unicode, which characters quietly count as two, and what makes a message switch to Unicode.
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Why timing is crucial for a bulk SMS campaign
The legal 10am to 9pm promotional window, the best days and times to send, and scheduling your campaign for a higher response.
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SMS sender ID prefixes in India
How Indian SMS headers are formed today, the category suffix system, and what replaced the older numeric prefixes.
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Send exam results via SMS to reach students instantly
How schools, colleges and coaching institutes send personalised exam results to students and parents by SMS, with no app needed.
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How SMS can make your election campaign a success
Voter outreach, booth and event information and get-out-the-vote reminders by SMS, plus the DLT and ECI compliance you need.
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Happy Diwali SMS in English: wishes and how to send
Ready-to-use Diwali greetings in English, plus how to send festival wishes to your customers at scale the compliant way.
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