CallVerifier
Regional MVNO: standardising SMS lab tests across three hubs
A mid-sized MVNO replaced spreadsheets and ad-hoc handset checks with one SMS testing workspace—so engineering, roaming, and fraud teams share the same evidence.
Every Call — Verified Before It Rings.
Capture every suspicious number before it harms your customers.
CallVerifier watches every call, flags suspicious behaviour, and automatically captures high-resolution screenshots you can use to investigate spam, spoofing, and fraud in seconds.
Hand-placed verification calls
SMS lab flows you can repeat
Bulk jobs with honest status columns
CallsReal dials, real timelines
SMSLab tests that don’t live in Slack threads
BulkTruecaller-style campaigns when scale matters
Field notes
What it looks like on someone else’s network
We anonymise names, but the problems are real: roaming SMS fights, spoofed inbound at a bank, bulk Truecaller sweeps after a route change. Skim the short version here or read the long form.
National carrier QA: scaling Truecaller bulk checks across number × provider matrices
A network quality team needed to burn down thousands of Truecaller-related lookups without hand-dialling each one—while still proving which provider × number combinations failed an...
Enterprise bank: building an evidence trail for high-risk inbound calls
A financial services group needed defensible records when customers reported spoofed numbers—not just “we checked the logs” but artefacts compliance could file with partners.
Inside the box
Three jobs, three screens (not seventeen tabs)
No “AI magic” checkbox here—just the workflows our customers actually bill time against: placing checks by hand, burning down SMS scenarios, and running bulk Truecaller jobs when the ticket count gets ugly.
Calls you place yourself
Pick country, route, and destination, then watch the attempt like a human—not a black box. History sticks around so when someone asks “what did we try Tuesday night?” you’re not digging through CDR exports.
SMS when email proof isn’t enough
Fire test messages, compare how providers behave, and keep number inventory filtered the way NOC folks expect. It’s deliberately unglamorous work—we just try not to lose it in a shared drive.
Truecaller bulk for the “we need all of these checked” weeks
Load a list, fan out jobs across number × provider pairs, and watch pending vs failed without refreshing a spreadsheet. Built for the weeks after a major route change—not for daily vanity metrics.
Roughly how a week goes
How CallVerifier keeps spam in check
Happy path first. The grey boxes are anonymised themes from customer calls—not star ratings, not stock-photo quotes.
We intentionally avoid fake “5-star reviews” here. Misleading testimonials are a common reason sites get manual actions or trust warnings—not something we want you (or Google) to worry about.
Voice checks
Manual call verification
Typical flow
- Jump into Calls, set country + provider + the MSISDN you’re actually worried about.
- Place the test dial and stare at status until it finishes (we’ve all been there).
- File the result: detail view, history, and captures if your org records screenshots.
Common theme
“Can we stop losing verification notes in chat and random screenshots in email?” — paraphrased from several network QA teams.
Anonymised pattern; not a verbatim quote, rating, or endorsement.
Messaging lab
SMS testing
Typical flow
- Open SMS testing—list view or flow view, depending what you’re debugging.
- Send the test, then compare what arrived (or didn’t) per provider.
- Filter down to the dodgy ranges and attach the outcome to the ticket.
Common theme
“We need one place carriers can open that isn’t a forwarded thread.” — recurring in messaging ops onboarding.
Anonymised pattern; not a verbatim quote, rating, or endorsement.
Big lists
Truecaller bulk testing
Typical flow
- Spin up a campaign and pick the Truecaller bulk module (the name’s specific on purpose).
- Paste or import numbers, then explode jobs across the provider matrix you care about.
- Watch pending vs failed without refreshing a CSV; re-queue the stragglers.
Common theme
“After a route change we just need the bulk board to tell the truth about pending vs failed.” — typical fraud/QA bulk sprint.
Anonymised pattern; not a verbatim quote, rating, or endorsement.
Where things live
Same app, different rooms
Calls, SMS, and bulk each get their own corner of the UI. Sounds obvious until you’ve watched someone hunt through six bookmarks for the same Tuesday incident.
Calls
Call Setup
Select country, provider, and expected number using our intuitive step-by-step interface.
SMS
Ready to Call
Review provider details and dial the phone number before starting the verification call.
Truecaller bulk
History & Evidence Log
Dive into every completed call, review attached screenshots, and share evidence with your fraud or compliance teams instantly.
Stop spam and fraud before it wins.
Whether you're protecting customers, policing your network, or documenting abuse for legal action, CallVerifier gives you irrefutable visual evidence for every suspicious call.
Why this exists
About CallVerifier
We built CallVerifier after seeing telecom teams struggle to prove spam and fraud. Every screenshot, verification, and flag you see inside the product is the result of years helping carriers and enterprises trace spoofed numbers, shut down robocalls, and present airtight evidence to regulators.
What we stand for
- Evidence first approach to spam and fraud
- Privacy and security baked into every feature
- Built for telecom scale, made simple for analysts
Human inbox
Let's talk about stopping spam
Tell us about the abuse you're fighting—spoofed numbers, robocalls, banking scams—and we'll show you how CallVerifier screenshots can help.