Blog

Practical guides on bulk SMS, DLT, WhatsApp Business API, RCS and voice messaging for Indian businesses.

Bulk SMS

1 November 2026 · 7 min read

How to register a header and template on DLT: step-by-step guide

A practical walkthrough of DLT registration in India: entity sign-up, header (sender ID) rules, content templates, consent templates and the mistakes that get templates rejected.

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Bulk SMS

1 November 2026 · 4 min read

SMS header suffix -P, -S, -T, -G explained

Why business SMS in India now show -P, -S, -T or -G at the end of the sender name, what each one means and what it changes for senders.

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Bulk SMS

1 November 2026 · 6 min read

Promotional vs transactional SMS: differences, rules and examples

Which SMS type should you use? A clear comparison of promotional, service and transactional SMS in India, with timing rules, headers and real examples.

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Pricing

1 November 2026 · 6 min read

Bulk SMS price in India: what decides the rate per SMS

Why one provider charges 12 paise and another 25 for the "same" SMS. The factors behind bulk SMS pricing in India and how to compare quotes properly.

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Bulk SMS

1 November 2026 · 5 min read

How to send bulk SMS from an Excel sheet

Turn a contact list in Excel into a personalised SMS campaign: format your sheet, map columns to template variables, test and send.

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API

1 November 2026 · 6 min read

OTP SMS best practices for apps and websites

Make OTPs fast, secure and easy to use: template format, expiry, retries, auto-read, rate limits and fallback channels.

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WhatsApp

1 November 2026 · 6 min read

WhatsApp Business API vs WhatsApp Business app: which one do you need?

The free WhatsApp Business app works for a shop owner on one phone. The API is for teams, automation and scale. Here is how to choose.

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WhatsApp

1 November 2026 · 6 min read

How to get the WhatsApp Business API in India

What you need, how onboarding works, how long it takes and what it costs to get the official WhatsApp Business API for an Indian business.

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WhatsApp

1 November 2026 · 5 min read

Is bulk WhatsApp legal in India? The official way to do it

Unofficial bulk WhatsApp tools get numbers banned and break the rules. Here is what is allowed, what is risky and how to send bulk WhatsApp messages properly.

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RCS

1 November 2026 · 5 min read

What is RCS messaging, and which phones support it?

RCS turns SMS into rich, app-like messages in the phone's default messaging app. What it is, which phones and networks support it in India, and how businesses use it.

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Voice SMS

1 November 2026 · 5 min read

Voice SMS for schools and coaching institutes in Delhi

How schools and coaching centres in Delhi use recorded voice calls for fee reminders, holiday notices and exam alerts that parents actually hear.

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Industries

1 November 2026 · 6 min read

SMS and WhatsApp marketing for real-estate developers in Gurgaon and Noida

A practical messaging playbook for real-estate developers and brokers in Gurgaon and Noida: project launches, site-visit reminders, payment milestones and lead follow-up.

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Bulk SMS

28 October 2026 · 4 min read

What is DLT registration and why your SMS needs it

Every business sending commercial SMS in India must register on a DLT platform. Here is what that means and how to get started.

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RCS

21 October 2026 · 5 min read

RCS vs SMS: when to use rich messaging

RCS adds images, buttons and carousels to the phone’s default messaging app. Here is when it beats plain SMS and when it does not.

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WhatsApp

14 October 2026 · 4 min read

WhatsApp template categories and how they affect cost

Marketing, utility and authentication templates are priced differently. Choosing the right category can cut your WhatsApp bill a lot.

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