WhatsApp broadcasts have the highest open rate of any channel available to a Pakistani business — and the fastest route to getting your number blocked. Both facts come from the same place: WhatsApp is personal, and customers punish anyone who treats it like a billboard.

Why most broadcasts fail

The failure is almost never the offer. It is one of these:

  • The list is scraped, not earned. Numbers collected from a group or bought from a vendor produce blocks, not sales.
  • The message is about you. "Eid Sale 30% off, visit our shop" is a poster, not a message.
  • It is sent to everyone. The customer who bought last week and the one who never replied get the same text.
  • There is no way to reply usefully. A broadcast that generates 200 responses your team cannot handle is worse than no broadcast.

List quality beats list size

A list of 400 customers who have bought from you outperforms 4,000 scraped numbers, every time, on every metric that matters. Build the list from people who messaged you first: past buyers, enquiries that did not convert, walk-ins who saved your number.

Segment it at minimum three ways — bought in the last 90 days, enquired but never bought, and lapsed beyond six months. Those three groups need genuinely different messages, and sending them the same one is why response rates collapse.

How to structure a message that gets replies

The structure that works consistently is short and personal:

  1. Name them. A message that opens with the customer's name reads as a message, not a blast.
  2. One line of context. Why they specifically are hearing from you — they bought this, they asked about that.
  3. One offer, stated plainly. Not three. Choice paralysis kills reply rates.
  4. A question, not a link. "Want me to hold one for you?" outperforms "Visit our website" by a wide margin, because replying is easier than clicking.

Keep it under four lines. If it needs a scroll, it is an email, and it will be treated like one.

Timing

For most consumer businesses in Pakistan the reliable windows are late morning, around 11am to 1pm, and evening, roughly 8pm to 10pm. Avoid Friday afternoons and the first three days of Ramadan, when engagement patterns change sharply. Test against your own data before trusting any of it — a B2B supplier and a clothing brand do not share an audience rhythm.

Staying inside the rules

WhatsApp does not publish exact thresholds, but the behaviour that gets numbers restricted is consistent and well understood:

  • Sending to people who never contacted you first.
  • High block-and-report rates in a short window — this is the one that actually triggers action.
  • Identical text to a very large list in a few minutes.
  • Ramping a new number straight to a large send volume.

Practical protection: warm new numbers up gradually, send in batches rather than all at once, personalise at least the greeting, and make opting out genuinely easy. A customer who leaves quietly costs you far less than one who reports you.

Treat the block rate as your real deliverability metric. If more than a small fraction of a campaign blocks you, stop and rewrite the message — no schedule change will save it.

Handling the replies

This is the part most businesses do not plan for. A good broadcast to 500 customers can produce fifty replies within an hour, all of them warm, most of them time-sensitive. If those land in a single phone with one person answering, you have converted a marketing win into a customer service failure.

Before you send: make sure replies route into a shared inbox, assign someone to own the campaign window, and prepare saved replies for the three questions the offer will obviously generate.

A realistic benchmark

For a well-segmented list of genuine customers, a good campaign gets a double-digit reply rate — far above email. If you are seeing low single digits, the problem is the list or the message, in that order. Fix the list first.