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.
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CNAM
6+ carriers checked
SMS
Latency & delivery
BULK
Truecaller sweeps
● LIVE · Global Routing Atlas
UPDATED · 14:32:19 UTC
Delivered < 400ms
Delay 400–1000ms
Failed / Timeout
● Carrier hub
01 · Coverage
14 carriers
Major US + UK + IN networks
02 · Latency
247ms
P95 SMS delivery test
03 · Sweep
12.8K
Numbers in last Truecaller bulk
04 · Uptime
99.98%
Trailing 30 days
Field notes
What it looks like on someone else’s network
We anonymise names, but the problems are real: spoofed CNAM at a bank, roaming SMS fights, bulk Truecaller sweeps after a route change. Skim the short version here or read the long form.
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Inside the console
Three workflows. One verified record.
No “AI magic” checkbox — just the three workflows our customers actually bill time against: CNAM checks across carriers, SMS delivery across providers and countries, and Truecaller bulk reputation campaigns.
CNAM verification across carriers
Call our device — we tell you exactly how your CNAM displays on AT&T, T-Mobile, Verizon, Truecaller, Hiya, and Robokiller. See spam flags, scam-likely banners, and CNAM mismatches per carrier in one report.
- 6+ carrier CNAM lookups per number
- Spam / scam-likely flag detection
- Historical CNAM drift over time
SMS delivery across providers
Send SMS to our device. We show the exact message that arrived, the time it took to land, the route the provider used — across multiple countries, regions, and languages. Compare provider behaviour side-by-side.
- Latency P50 / P95 per provider
- Multi-country & multi-language routing
- Content drift & truncation detection
Truecaller bulk reputation
Upload a number list, schedule a campaign, and we run Truecaller reputation lookups at your selected time. Each number returns its current Truecaller status, reports count, and category — exported clean.
- Scheduled bulk runs (any timezone)
- Per-number Truecaller status & report count
- CSV / API export for downstream pipes
Roughly how each area works
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.
CNAM checks
CNAM verification
Typical flow
- Call our test number — we capture the inbound CNAM headers.
- We look up the same number across AT&T, T-Mobile, Verizon, Truecaller, Hiya, Robokiller.
- You get a report: displayed name + flag status + report count per carrier.
Common theme
“Why does our number show as ‘Scam Likely’ on one carrier but ‘Verified’ on another?” — paraphrased from several support teams.
Anonymised pattern; not a verbatim quote, rating, or endorsement.
Messaging lab
SMS testing
Typical flow
- Send SMS to our endpoint — pick origin country / provider / language.
- We log the exact body that landed and the time it took.
- Compare side-by-side: same message, different routes — what changed.
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.
Campaigns
Truecaller bulk testing
Typical flow
- Upload your number list and schedule a run window (any timezone).
- We fan out Truecaller reputation lookups across your selected window.
- Per-number status, reports count, and category — exportable as CSV.
Common theme
“After a route change we just need the bulk board to tell the truth about which numbers got flagged.” — typical fraud/QA bulk sprint.
Anonymised pattern; not a verbatim quote, rating, or endorsement.
Where things live
Same app, three rooms
CNAM, 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 incident.
Call Setup
Select country, provider, and expected number using our intuitive step-by-step interface.
Ready to Call
Review provider details and dial the phone number before starting the verification call.
History & Evidence Log
Dive into every completed call, review attached screenshots, and share evidence with your fraud or compliance teams instantly.
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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.
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.