A client once told me their support team prided itself on long, thorough calls. Then we looked at the data: average handle time was high, repeat calls were frequent, and CSAT wasn't improving. The issue wasn't the agents. It was the channel. Complex instructions repeated verbally are easy to forget.
The client's agents were spending an average of 12 minutes on each call. They were reading out withdrawal reference numbers, walking players through password reset steps, and explaining bonus terms in detail. The players were grateful during the call, but many of them called back within 48 hours because they had forgotten the details. The repeat calls were not a sign of agent failure—they were a sign that the channel was wrong. Voice is a transient medium. The player hears the information once, and unless they write it down, it's gone.
Data Point 1 — The 20.34% CTR
According to Omnisend's 2025 benchmarks, automated SMS achieves a 20.34% click-through rate, well above the 12.39% average for one-time bulk sends. But CTR is not resolution. A post-call SMS with a high CTR but a rising repeat-call rate may be driving clicks without solving the problem.
The distinction matters because CTR is often used as a proxy for success, and it can be misleading. A post-call SMS that says "Click here to see your withdrawal status" may generate a high CTR, but if the landing page is confusing or the status is not actually updated, the player will call back. The CTR looks good, but the resolution rate is poor. The metric that matters is the ratio of resolved issues to total issues, not the ratio of clicks to delivered messages.
The better design is to use the SMS to deliver the resolution, not just a link. If the withdrawal has been approved, the SMS should say so, with the reference number and the expected arrival time. If the password has been reset, the SMS should include the new temporary password or a direct reset link. The SMS should be self-contained, so the player doesn't have to click through to another channel to get the answer.
Data Point 2 — The 30% to 70% Cost Gap
Laaffic's FlashCall release notes that verification costs can be reduced by 30% to 70% when moving from SMS to voice-based verification. The same logic applies to post-call follow-ups: a short SMS costs a fraction of an additional minute of voice.
Consider the math. A voice minute in Southeast Asia or Latin America may cost between $0.02 and $0.10, depending on the carrier and the destination. An SMS may cost between $0.005 and $0.02. If a post-call SMS replaces three minutes of voice explanation, the savings are not just the cost of the three minutes—they are also the cost of the agent's time, which is often the larger expense. The agent can move on to the next call, and the player has a written record of the resolution.
In the Philippines and Latin America, Laaffic's AI voice broadcasting combined with hang-up SMS achieved a single-user recall cost as low as $0.7, with ROI as high as 383% according to Laaffic's SiGMA Asia recap. The same cost logic applies to post-call support: the SMS is cheap, the voice call is expensive, and the combination of the two produces better outcomes than either alone.
Data Point 3 — The 10x Agent Multiplier
AI two-way SMS, integrated with large language models, can handle multiple concurrent sessions. According to Laaffic's market data, one AI agent is equivalent to 10 human customer service representatives. When combined with human inbound calls, the post-call SMS becomes the entry point for automated service.
This does not mean that AI replaces human agents. It means that AI handles the routine follow-ups, and human agents handle the complex issues. A player who replies to the post-call SMS with a simple question—"When will my withdrawal arrive?"—can be answered by the AI, using the data from the CRM. A player who replies with a complex complaint—"I think my account was hacked"—is escalated to a human agent, with the full context attached.
The 10x multiplier is not a literal headcount replacement. It is a capacity multiplier. The human agents can focus on the calls that require judgment, negotiation, or empathy. The AI handles the calls that require speed, accuracy, and availability. The combination produces a support operation that is faster, cheaper, and more consistent than either approach alone.
Where the Data Stops Being Useful
Post-call SMS is not always a cost-saving measure. If the SMS is sent to every caller regardless of outcome, the cost adds up without a corresponding benefit. If the SMS generates more questions than it answers, the support team ends up handling more messages, not fewer.
The ROI case also depends on the market. In markets where SMS delivery is reliable, the cost-benefit favors SMS. In markets where SMS delivery is unreliable, the FlashCall fallback adds cost, but it also adds reliability. The calculation should account for the fallback rate, not just the cost of the primary channel.
There is also a compliance cost. In some markets, the operator must register the Sender ID, submit message templates for approval, and maintain consent records. These costs are not visible in the per-message price, but they are real. The ROI case should include the compliance overhead, not just the telecom cost.
Frequently Asked Questions
Is post-call SMS billed per message or per session?
Per message, typically. FlashCall is billed per verification. The cost per SMS is significantly lower than an additional minute of voice.
Does it actually improve first-contact resolution?
Yes, if the SMS moves detailed instructions out of the voice call and into a written reference.
Is it cheaper than a callback in Latin America or Southeast Asia?
Usually yes. A callback doubles the voice cost and may fail if the player is unavailable.
How do I measure repeat-call reduction?
Compare repeat-call rate for SMS recipients against a control group that did not receive the SMS. The difference is the reduction attributable to the SMS.
Data Sources & Corrections
Data Sources
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Omnisend: SMS Marketing Benchmarks 2026
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World Bank: Thailand's Next Phase of Growth
Correction Contact: service@laaffic.com or +63 9637902308.
Published: 2026-10-28 | Last Updated: 2026-10-30
