Overview
In an era of increasing cyber threats, securing user accounts is non-negotiable. SMS-based Two-Factor Authentication (2FA) remains the global standard for identity verification due to its ubiquity and reliability. D-Caller's Device Verification service is engineered for mission-critical security, ensuring your One-Time Passwords (OTPs) are delivered instantly, every single time.
We understand that in user onboarding, every second counts. A delayed OTP means a lost customer. That's why we don't just route your OTPs through standard pipes; we use dedicated, high-priority 'Transactional' routes with direct operator binds. This ensures typically single-digit latency (under 10 seconds), providing a seamless user experience.
Our intelligent platform handles the complexity of global delivery. We automatically format phone numbers, select the best routing path based on real-time network conditions, and handle failovers if a carrier is down. You just hit our API, and we ensure the message lands.
Security is paramount. We support template-based sending to prevent content tampering, and all data is transmitted over encrypted channels. We are fully compliant with DLT (Distributed Ledger Technology) regulations in India, assisting you with the registration of your headers and templates to ensure your messages are never blocked.
Key Features
Flash Delivery Routes
Exclusive high-priority channels reserved for OTPs and alerts to ensure near-instant delivery.
Global Coverage
Verify users in over 200 countries with our extensive network of international carrier connections.
Intelligent Routing
Algorithms that automatically select the fastest and most reliable path for each message in real-time.
Template Management
Easy-to-use interface to manage and approve your DLT templates for regulatory compliance.
Sender ID Customization
Enhance brand recognition by sending messages from your custom 6-character Sender ID (e.g., AD-GOOGLE).
Why Choose This Service?
Higher Conversion Rates
Fast OTP delivery reduces drop-offs during sign-up and checkout processes.
Fraud Prevention
Stop fake accounts and bots by ensuring every user is tied to a verified mobile number.
Seamless Integration
Drop-in code snippets for all major languages make adding 2FA to your app a 10-minute task.
Regulatory Compliance
Stay automatedly compliant with local telecom regulations like DLT in India and GDPR in Europe.
Technical Specifications
Transparent Pricing
High-priority transactional route
What's Included
Frequently Asked Questions
What is DLT registration?
DLT is a blockchain-based system mandated by TRAI in India to control spam. Businesses must register their entity, headers, and templates. We guide you through this.
Can I send promotional content via this route?
No. The transactional route is strictly for informative messages (OTPs, alerts). Promotional content will be blocked.
What happens if delivery fails?
We have automatic failover to alternative routes. If it still fails (e.g., handset off), we provide a specific error code via callback.
Do you support international numbers?
Yes, we support delivery to over 200 territories worldwide with dynamic pricing based on destination.
"Trust is the currency of the digital age. Secure your platform and build trust with D-Caller's reliable SMS Verification."
Speak to an ExpertCommon Use Cases
Two-Factor Authentication (2FA)
Secure logins and protect user accounts from unauthorized access.
User Registration
Verify phone numbers during the sign-up process to build a high-quality user database.
Transaction Authorization
Send OTPs to confirm high-value financial transactions or profile changes.
Password Resets
Securely allow users to regain access to their accounts via a verified mobile channel.
Enterprise Ready
ISO 27001 Certified & GDPR Compliant Infrastructure.