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Bypass Fraud
Detect SIM Box rapidly. Protect termination revenue.
Move from reactive detection to proactive, fast, and accurate fraud prevention.
Subex’s AI-powered Bypass Fraud Management solution delivers exceptional speed and precision in identifying SIM Box activity. By combining machine learning models, intelligent rule frameworks, and link analysis, we help operators safeguard international termination revenues and ensure network integrity.
Legacy Rules Miss Modern Fraud
SIM box / interconnect bypass (voice) has been estimated at $1.92B in annual losses. (Source: CFCA Global Fraud Loss Survey 2025).
SIM Box fraud has evolved significantly, with fraudsters now mimicking legitimate subscriber behaviour, using rotating SIMs, and distributing traffic across locations to evade traditional rule-based systems. Legacy approaches dependent solely on fixed thresholds and past patterns fail to detect newer, more sophisticated fraud operations.
This challenge results in:
- Consistent revenue leakage from bypassed international traffic
- Inability to detect complex, distributed, and fast-changing SIM Box operations
- Extended fraud run-times caused by delayed detection and manual intervention
- Higher operational effort due to continuous rule maintenance
Operators require a detection framework that is adaptable, fast, and comprehensive.
Real Impact. Real Efficiency. Real Results.
Maximize Revenue Protection
Recover and safeguard revenue lost to illegal bypass activity.
Rapid, Accurate Detection
Machine learning models and rule-based analysis deliver high precision with minimal false positives.
Reduced Fraud Runtime
Near real-time detection ensures SIM boxes are identified quickly, cutting down potential losses.
Lower Operational Overhead
Automated detection and investigation tools reduce manual workload and simplify operations.
Where SIM Box Fraud Hits a Wall
Detect early. Disrupt fast. Protect termination revenue.
How we tackle it with
Subex's Fraud Management system?
Solution Features
Machine Learning–Driven Detection
Identifies behavioral anomalies, device patterns, and traffic irregularities associated with SIM Box activity.
Advanced Rule Engine
Allows configurable thresholds, expression-based conditions, correlation rules, trend analysis, and velocity checks
Link Analysis & Visualization
Correlates MSISDNs, IMSIs, IMEIs, cell locations, and call patterns to uncover hidden relationships indicative of bypass operations.
Real-Time Blocking Capability
Enables automated or operator-approved blocking directly from the Subex platform to stop fraud at the source.
Enhanced Analysis Arena
Offers detailed dashboards for geo-location insights, usage profiling, SIM rotation visibility, and revenue impact assessment.
Where Intelligence Turns Into Blocking
ML, rules, and link analysis-built to find clusters and block in real time.
Success Stories
"Building trust across our operations is important for us at MTN Eswatini. Thanks to the Subex’s solutions and teams for rich insights that are enabling us to make decisions faster, keeping us at the forefront of change".
STCCEO 
"Subex’s signalling security solution not only helped us succeed in reducing these spoofed calls, which were leading to less income and, more importantly, impacting customer’s experience, but we also use the tool to determine if an ongoing call campaign is genuine or not".
STCCEO 
"As a growing operator it is extremely important that we reduce revenue leakage so that we can continue to provide our new product and services to our customers, Subex’s revenue assurance and fraud management systems will allow us to do this effectively".
STCCEO 
"We have selected Subex as their solution offered true future-proofing with the most advanced feature set to drive significant efficiency gains. In addition, the Machine Learning capabilities gives Turk Telecom the agility to ensure an effective risk coverage while keeping pace with business".
STCCEO 
"Stc has been partners with Subex across the last 17+ years, through their deployment of ROC Revenue Assurance and ROC Fraud Management. Subex’s iRAFM solution will provide us
a robust foundation of risk mitigation as part of our journey towards innovation and evolution in the digital world".
STCCEO 
"We selected to partner with Subex once again due to their experience of executing Revenue Assurance and Fraud Management operations, their proven ability in implementing Management Services engagements across the globe, and the value that they bring in terms of savings and ROI".
STCCEO 
"We firmly believe that their capabilities on the Business Assurance and Fraud Management front, coupled with their innovation quotient in the AI/ML space, will provide us the confidence that they will be able to effectively support and safeguard our business, services, and customers".
STCCEO 
"We are pleased to partner with Subex and deploy the latest version of their ROC Fraud Management solution. This will ensure much faster processing and detection times, providing far more flexibility, easier access, and agility to our business operations".
STCCEO 
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Frequently Asked Questions
Everything you need to know about how our Bypass Fraud solutions work.
Does the solution support real-time blocking?
Yes. The solution can execute automated or operator-initiated blocking commands to immediately disrupt SIM Box operations and reduce fraud runtime.