Bulk SMS is the sending of one text message to many mobile numbers at once from a platform or an API rather than a handset. In Zambia that means reaching MTN, Airtel and Zamtel subscribers — on any phone, with or without internet — from a single account, with a delivery report for every message.
How bulk SMS works in Zambia
Every mobile number in Zambia belongs to one of three networks, and each network accepts application traffic (messages sent by software rather than by a person on a SIM) over a carrier-grade connection called an SMPP bind. A bulk SMS platform holds those connections so you do not have to. When you send, the platform does five things:
- Accepts your message and recipients — from the web console, the Android app, an uploaded spreadsheet, or an API call from your own software.
- Checks each number — normalises it to the international form, drops invalid entries, and suppresses anyone on your opt-out blacklist.
- Prices and reserves credits — you see the credit cost before you confirm; credits are deducted only for messages actually queued.
- Routes by network — the number prefix decides whether the message goes to the MTN, Airtel or Zamtel connection, and the message is submitted with your approved sender ID.
- Collects the delivery report — the network reports back whether the handset received it, and that status is stored against the message so you can see it in the dashboard, poll it from the API, or have it pushed to a callback URL.
That last step is what separates a bulk SMS platform from forwarding messages off a phone: you know, per recipient, what happened.
What Ontech BulkSMS includes
Web console and mobile app
Send, schedule, run campaigns, manage contacts and buy credits from the browser or the Android app.
Personalised sends
Upload a spreadsheet and write one template with merge fields; every recipient gets their own name, balance or date.
Branded sender IDs
Send from your company name (up to 11 characters) once your sender ID is approved on an authorization letter.
Delivery reports
A network delivery status for every message, exportable from the dashboard and available over the API.
Campaigns with A/B testing
Send two versions to a split of your group and compare delivered counts per variant. See SMS marketing.
API and SMPP
An HTTP/JSON API for applications and an SMPP 3.4 server for high-volume integrations.
Two-way keywords
Receive replies and keyword messages on the shared short code in an inbox with conversation threading. See two-way SMS.
Reseller programme
Bring your own customers and earn commission on their top-ups. See the reseller programme.
Who uses bulk SMS in Zambia
The same platform carries very different messages depending on the sender. A microfinance institution sends one-time passwords and repayment reminders; a school sends fee balances and results; a church sends service reminders; a retailer sends a Friday promotion. The industry guides describe each in detail, with the sample messages they actually send. The two broad categories are:
- Transactional SMS — triggered by an event (a payment, a login, a due date), sent one at a time from your system, expected by the recipient.
- Marketing SMS — promotions and announcements to a list of people who opted in, sent as a campaign with an opt-out path.
Sending your first bulk SMS
- Create a free customer account. It comes with trial credits so you can send a test message straight away. Resellers apply for a partner account instead.
- Add contacts — type them, import a CSV, or upload a spreadsheet — and optionally organise them into groups.
- Request a sender ID under Sender IDs and upload your authorization letter. Until it is approved you can still send using the platform's default sender.
- Buy credits with MTN MoMo, Airtel Money or Zamtel Kwacha. The rate card and the credit cost of a send are shown before you pay.
- Compose, preview the personalised message, send or schedule, and watch the delivery reports arrive.
The video tutorials walk through a personalised bulk send, buying credits, a campaign with A/B testing and the sender ID request end to end.
Bulk SMS pricing in Zambia
Ontech BulkSMS is pay-as-you-go: you buy SMS credits and each message consumes credits according to its length (a standard message is one credit; longer messages are split into segments). Rates are volume-based — the more credits you buy in one top-up, the lower the per-credit rate — and the full rate card is shown in your dashboard before you pay. There is no monthly fee for a customer account. Enterprise volume and reseller wholesale terms are agreed with info@ontech.co.zm.
Bulk SMS and Zambian data protection
Recipient numbers and message content are personal data. Ontech Solutions Limited is registered with Zambia's Data Protection Commission (registration DP000394); the platform's Privacy & Data Protection notice sets out what is collected, why, and how long it is kept, and the Terms & Acceptable Use require that promotional messages go only to recipients who have consented and can opt out. The blacklist exists so that an opt-out is honoured automatically on every future send.