How to Find Customers for SMS OTP Services: Which Delivery Complaints Deserve a Follow-Up?
For SMS OTP provider sales teams: distinguish delivery failures from number eligibility, ask about carrier-level evidence, and qualify a limited test before quoting.
“Our Indonesian users cannot get the registration code. Any SMS providers here?”
All example messages and figures in this article are hypothetical, not customer quotes or measured results.
If you sell SMS delivery, that is a useful conversation to notice. It is not yet a reason to send your entire price list. The developer might need a backup sending route, help with an application error, or phone numbers that a completely different platform will accept. Those are different requests, even when everyone in the group calls them an “OTP problem.”
To find customers for SMS OTP services, look for developers discussing a live verification problem, establish which service they actually need, then ask for enough evidence to propose a relevant next step. OTP means a one-time passcode used in a registration, login or other verification flow. Your job as provider BD is to identify a conversation your team can help with—not to diagnose a production incident from one message.
Key takeaway
- Sending verification texts to an app’s users and renting numbers to receive another platform’s codes are different services.
- A delivery complaint becomes more actionable when the speaker can explain the affected market, failure stage and test window. It still does not prove the cause or a purchase decision.
- Before quoting a replacement, agree what a limited, authorized test would measure and who can approve it.
First ask: sending codes, or receiving them on rented numbers?
Developer communities, app-growth groups and messaging-integration discussions can contain both types of request. Select groups where your intended customers discuss their own registration or login systems; follow group rules before responding. A directory full of “SMS” groups is less useful than knowing whether their members buy the service you provide.
An outbound SMS requirement might read: “Our app sends login codes to customers in Indonesia. One carrier’s delivery receipts have deteriorated.” This is application-to-person messaging, often shortened to A2P. The app is sending messages to its users. A sending provider can discuss supported destinations, sender configuration, reporting and a possible alternate route.
A receiving-number requirement might read: “I rented a number, but another app rejects it before it sends a code.” Here the platform’s number-acceptance policy may be the immediate issue. A different outbound SMS route does not change the receiving number’s type or override that platform’s rules.
Twilio’s Line Type Intelligence documentation distinguishes mobile, landline, fixed VoIP and non-fixed VoIP numbers. VoIP means voice over internet protocol. These classifications are not a ranking of sending routes. A valid number is not automatically eligible for every service, and a number-type lookup is not proof of ownership.
Ask plainly: “Are you sending codes from your own app to users, or trying to receive codes from another service?” If your company offers both products, route the enquiry to the relevant specialist. Do not sell “bypassing virtual-number detection” as the answer. Establish the legitimate use and the platform’s documented requirements instead.
“Delivery fell” needs a denominator
The phrase “our success rate collapsed” sounds urgent, but it hides several possible measurements. Did the API accept fewer requests? Did delivery receipts decline? Did users stop entering the code? Or did registration fail after verification had already succeeded?
For example, Twilio defines the outbound sent status as:
“The nearest upstream carrier accepted the outbound message.”
That is not confirmation that a person received the code. Its delivered status reflects delivery confirmation from the upstream carrier and, where available, the destination handset. Even that does not establish that the user read or submitted the code. The separate VerificationCheck resource validates the user-provided token. Other providers may use different labels, so ask what the prospect’s dashboard actually counts.
| The developer reports | Ask before offering a route test |
|---|---|
| “The API returned success” | Was the message queued, passed to a carrier, or reported delivered? |
| “Users are not receiving texts” | Which country, carrier, time window and message statuses are involved? |
| “Verification completion fell” | What counts as a successful check, and are retries counted separately? |
| “Registration fell from 35% to 12%” | Is the denominator all registration starts, SMS attempts, or unique verification sessions? |
A registration-rate decline can justify a closer look without identifying the responsible supplier. For example, a change in acquisition traffic or a later registration step may affect the total. These are possibilities to investigate, not alternative diagnoses to assert in a sales chat.
Ask for a small, masked summary: affected markets, carrier split, timestamps with timezone, failure statuses and recent changes. Do not ask someone to post complete phone-number lists, live verification codes or API keys in the group. If more detailed logs are needed, the teams should agree an approved support channel and access scope.
Two similar messages, different next questions
AI-generated conceptual illustration: sending, delivery and code checking are distinct stages. This is not a provider dashboard or a measured result.
The following messages and numbers are simulated examples, not customer quotes or measured outcomes.
Message A:
“Any cheap SMS APIs? Our new app keeps getting complaints about missing codes.”
This contains too little information to prioritize an engineering investigation. It does not prove that the developer has no budget, that the app is broken, or that a cheap provider caused the problem. A brief question may be worthwhile: “Which country is affected, and are these registration codes your app sends to its own users?”
If the answer identifies a supported market and a real integration, continue. If the person wants a receiving-number service that your company does not offer, say so. If there is no reply, do not keep allocating presales time on the assumption that a large deal is hidden behind the message.
Message B:
“Our Indonesia registration rate dropped from 35% to 12% over two days. Telkomsel users report timeouts. We send around 500,000 texts a day and have a launch next month. Looking for a backup-provider test. We think the frontend is fine, but are still checking the logs.”
This gives you more to ask about: a market, an affected carrier, a time window, reported scale and an explicit invitation to discuss a test. None of those details has been independently verified. “The frontend is fine” is the developer’s current assessment, not an established exclusion of application issues.
Start with the two details that change the proposed test: “Does the daily count include retries, and what happened to delivery receipts for Telkomsel during those two days?” Then establish whether the speaker owns the integration, supports a client’s integration, or is forwarding someone else’s request.
If a later reply mentions Brazil and Vivo, keep that evidence separate. Do not combine a Brazilian delivery complaint with an Indonesian launch date into one incident. For a narrower example of that conversation, see what an OTP salesperson should ask when a Brazil test times out.
A complaint is a reason to ask a better question—not proof of the cause, or proof that the customer is ready to switch.
Offer a bounded test, not an unsupported promise
AI-generated conceptual illustration: keep each market’s carrier, timing and source discussion together instead of merging separate complaints into one incident.
A useful first reply might be: “We can check whether our supported route fits your affected traffic. Could you share a masked carrier-level status summary and the time window? If the scope matches, we can agree a limited comparison with your technical owner.”
Only mention direct carrier connections, a service-level agreement (SLA), priority handling or a particular destination if your company can document that capability and its conditions. Do not borrow claims from a sample sales script. Nothing in a Telegram complaint establishes that operators in a country have “recently tightened controls.”
Before arranging a comparison, ask who can approve the traffic, test budget and production changes. Agree which users or test numbers are authorized, which carrier and time window to include, and when to stop or revert. There is no universal “send 10,000 messages” threshold that makes every test representative or appropriate.
Hold relevant settings steady where feasible: sender identity, message template, retry behavior and measurement definitions. If those change along with the route, record the differences rather than attributing every improvement to your service. Report delivery receipts and completed code checks separately; do not present either as completed registrations.
Retry behavior matters commercially, too. Twilio recommends retry buffers to avoid repeated messages, rate limits and unnecessary or fraudulent spending. A claimed half-million sends may include retries or abusive traffic rather than half a million people. Ask how the count is constructed. Do not disable abuse controls to produce an attractive test result.
If the developer can explain the affected segment but cannot authorize a test, the next step may be an introduction to the integration owner—not a quotation. If your company does not support the required sender or destination, saying that early is more useful than keeping an unsuitable opportunity in the queue.
Keep the message that changes the sales conversation
AI-generated conceptual illustration: review the enquiry and agree permission, scope and stopping conditions before a limited test. No test outcome is depicted.
In a busy developer group, the most useful information may arrive several replies after “codes are failing.” One reply names the carrier. Another clarifies that the count includes retries. A final message says the team has already fixed its integration. Saving only the first complaint leaves BD working from an obsolete picture.
If you follow a small number of groups, native search and a manual note may be enough. Keep the original message location, timestamp, speaker’s stated role and the unanswered question. This article on reducing Telegram message overload explains ways to organize that manual work.
TOP Prospect helps you find relevant discussions in the Telegram sources you select, remove duplicates and retain original messages, sources and related context so you can decide which enquiry to review first. You configure keywords and extraction rules; the system uses those conditions and AI-assisted filtering to organize candidate leads. The final decision and follow-up remain yours.
For this use case, rules might look for OTP or missing-code discussions alongside a market, carrier or request for a backup test. These are clues, not a diagnosis. TOP does not inspect the app’s SMS delivery logs, certify a buyer’s volume, read private chats or automatically contact the speaker. Use only sources you are entitled to access and permitted to process; access alone is not blanket permission for AI use under Telegram’s content terms.
Questions an SMS provider BD is likely to ask
Should I ignore a prospect who asks only about price?
No. Price is a legitimate requirement. Ask a low-effort question about market and use case before deciding whether the enquiry fits. Missing details justify limited initial effort, not an assumption about the person’s budget or technical competence.
Does a problem on one carrier prove the route is bad?
No. It identifies a segment to investigate. Request statuses, timing and relevant configuration changes before assigning a cause. A route comparison may help once its scope and success criteria are agreed, but the group message alone is not that comparison.
Can a new SMS route make a rejected virtual number acceptable?
Do not promise that. Recipient-number eligibility and sending-path performance are different issues. Establish the recipient type and the platform’s supported-number policy. A customer asking to evade detection is not asking for the same service as a legitimate app sending codes to users.
Can TOP Prospect identify the cause or reply for me?
No. It organizes relevant messages and their context for your review. Technical diagnosis belongs to the teams with authorized access to the integration and delivery evidence. Commercial contact, qualification and any test agreement remain human decisions.
The next useful sales action is often one specific question: “Which stage failed, and who can authorize a comparison?” Get that answer before treating an urgent group complaint as a route-replacement deal.
Sources and further reading
How a Signal worth attention is found
See how Top Prospect finds and organizes Signals worth checking, keeps the original Telegram context, removes duplicates, and helps you decide what to review first. You decide whether to follow up and what to do next.
