Stable Phone Numbers for SMS & OTP Testing in 2026
Flaky SMS tests cost sprint time. Get a dedicated real-SIM US number that stays consistent across every CI/CD run, test suite, and environment.
- Receive OTP and 2FA SMS in a stable, dedicated inbox
- Real-SIM US number — not VoIP-flagged or recycled mid-test
- Webhook delivery for automated test result capture
- Team access: Slack, Discord, Telegram, Teams, Email, and Webhook alerts
Why SMS Testing Breaks in Automated Pipelines
Most SMS testing setups fail the moment teams scale. Shared VoIP pools get flagged, disposable numbers get recycled between runs, and rate limits kill parallel test jobs. QA teams spend hours debugging delivery failures that have nothing to do with the actual code being tested.
- •VoIP numbers are actively rejected by authentication flows — your test hits a block before the OTP is even sent
- •Recycled or pooled numbers mean a previous test run's code lands in your current run's inbox
- •Temporary one-time numbers can't be reused across a long-running regression suite or nightly build
- •Rate limits on shared number pools cause intermittent failures that are nearly impossible to reproduce locally
- •Public/free SMS services expose your verification codes to anyone — a security risk in staging environments
QA teams need the same number to be available across every run — not a fresh disposable that vanishes after the first SMS. JoltSMS rentals persist month-to-month so your test suite stays consistent.
How JoltSMS Solves the SMS Testing Problem
JoltSMS provides dedicated real-SIM US numbers that your QA pipeline owns for the full rental period. No recycling. No shared pools. No surprise rate limits mid-run.
- Real carrier SIM numbers (T-Mobile/AT&T) — not VoIP, not virtual, not flagged by auth systems
- Dedicated to your team for the rental period — no other customer shares your number
- Webhook delivery — route SMS directly into your test framework or CI/CD pipeline
- Persistent month-to-month — same number across every sprint, regression suite, and release cycle
- Team inbox — QA lead, devs, and automation engineers all see incoming codes
Who uses JoltSMS for SMS testing?
Test Automation Engineers
Integrate a stable JoltSMS number directly into Playwright, Selenium, or Cypress test suites. The same number receives OTP codes run after run — no manual resets between test jobs.
CI/CD Pipeline Owners
Wire JoltSMS webhook delivery into GitHub Actions, Jenkins, or GitLab CI. Verification codes land in your pipeline's HTTP endpoint automatically — no polling, no browser automation for the inbox.
QA Teams & SDETs
Maintain stable staging and pre-production environments with a number that doesn't change. Onboard new team members, share the inbox, and audit every SMS your test accounts receive.
Add reliable SMS testing to your pipeline in minutes
Sign up at JoltSMS
Get a dedicated US real-SIM number assigned to your team
Configure webhook delivery
Set your test framework's endpoint as the JoltSMS webhook target — codes are HTTP-posted on arrival
Add the number to your test config
Set the JoltSMS number as the test account's phone number in your staging or pre-prod environment
Trigger the verification flow in your test
Playwright, Selenium, or your custom framework submits the form — the platform sends an OTP
Capture the OTP via webhook
Your pipeline receives the SMS code at the webhook endpoint and feeds it back into the test
Assert and continue
The verification step passes with a real code from a real carrier — repeat across every CI run
Share SMS verification access across your entire QA team
JoltSMS numbers aren't tied to one person's phone. The shared inbox and notification system means every engineer on the team can see incoming codes — whether they're running tests locally or reviewing CI results remotely.
- Webhook delivery routes OTP codes directly into your CI/CD pipeline without manual intervention
- Shared dashboard inbox for QA leads reviewing test account activity
- Slack and Discord notifications for instant team visibility when codes arrive
- Email forwarding for async audit trails and compliance
- API access for programmatic workflows — query the inbox or configure numbers without the dashboard
What to know before integrating JoltSMS into your test pipeline
JoltSMS provides real-SIM inbound SMS numbers — not a full SMS testing API like Mailosaur or Twilio. We don't offer virtual/simulated numbers or message mocking. Everything routes through a real US carrier, which means real delivery behavior — and real acceptance by authentication systems.
Best practices:
- Use a single JoltSMS number per test environment tier (staging, pre-prod, UAT) to avoid cross-environment message bleed
- Set your JoltSMS webhook URL in your test config rather than polling the dashboard for codes — it's faster and CI-friendly
- Keep the number active month-to-month so your test account's registered phone number never becomes invalid
- Rotate the test account's verified number only when you intentionally change test fixtures — not between every run
- JoltSMS is inbound-only — if your tests require sending outbound SMS, that's out of scope
- US numbers only — if your test environment targets non-US phone number validation, check compatibility first
QA Testing verification FAQ
Mailosaur and Twilio provide virtual/simulated phone numbers. JoltSMS provides real physical SIM numbers on US carrier networks. The practical difference: real-SIM numbers are accepted by authentication flows that explicitly block VoIP, virtual, and cloud numbers. If your test application uses a third-party service with strict phone validation (Stripe, PayPal, fintech, social platforms), a real-SIM number is far less likely to be rejected at the verification step.
Stop debugging flaky SMS tests. Get a stable number.
A dedicated real-SIM US number costs less than an engineer's hour of debugging SMS delivery failures. Get set up in minutes.