Bring the Power of the Network Inside
Facing dead zones, dropped calls, or floors with no usable signal? Nextivity Cel-Fi is the smartest solution. It captures the strongest available outdoor signal, amplifies it using patented IntelliBoost® technology, and distributes it uniformly throughout your entire space giving every device, on every floor, reliable connectivity from 4G and 5G voice and data, to IoT sensor networks, private 5G infrastructure, and smart building services, all running on a single platform
Performance Leader
Highest Gain, Lowest TCO
Single
and Multi-Carrier Solutions
Leverage
as IoT Sensor Network “Do More with DAS"
Legal & Carrier-Approved
for Fast Deployments
Remote Monitoring
and Management
Choose the Right Cel-Fi Solution
Engineered for varying architectural complexities and coverage requirements.
CEL-FI QUATRA 4000e
Multi-Carrier Active DAS
Boost indoor 4G LTE coverage with this carrier-approved, multi-carrier Active DAS. Delivers strong, reliable voice and data across large buildings with multiple operators simultaneously.
Ideal for: Offices, hotels, hospitals, shopping malls, and commercial complexes.
Multi-carrier simultaneous coverage
Off-air or Supercell® Small Cell mode
IoT sensor
Remote management via WAVE Portal
CEL-FI QUATRA EVO
Single or Dual Operator
Enhance indoor 4G LTE coverage with this carrier-approved, flexible Active DAS. Supports single or dual-operator networks, delivering strong, reliable voices and data across large buildings.
Ideal for: Offices, hotels, hospitals, and commercial buildings requiring flexible single or dual-operator coverage.
Single or dual-operator support
4G LTE carrier-approved
Flexible Active DAS architecture
Strong, reliable voice and data
CEL-FI GO G43
Portable Signal Booster
Enhance 4G LTE coverage in small buildings and rooms. This portable, carrier-approved signal booster delivers strong, reliable voice and data, simple to deploy with no specialist installation required.
Ideal for: Small offices, homes, vehicles, and temporary locations.
Up to 100 dB covers up to 1,200 m²
Single or dual operator · configurable via WAVE App
4G/LTE NR bands
Plug & play — no professional install needed
TRUSTED BY LEADING ORGANIZATIONS
Case Studies
Real-world results across diverse industries.
Ready to Eliminate Your Dead Zones?
Our team will assess your space, recommend the right Cel-Fi solution, and handle everything from survey to deployment. Get in touch with us, we respond fast.
Bring The Power Of The Network Inside The Building
Learn how our proprietary intelliBoost technology delivers strong reliable cellular signals everywhere you need them
CEL-FI QUATRA 4000e
Boost indoor 4G LTE and 5G coverage with Nextivity CEL-FI QUATRA 4000e. This carrier-approved, multi-carrier Active DAS delivers strong, reliable voice and data across large buildings, including offices, hotels, hospitals, and commercial complexes.
CEL-FI QUATRA EVO
Enhance indoor 4G LTE and 5G coverage with Nextivity CEL-FI QUATRA EVO. This carrier-approved, flexible Active DAS supports single or dual-operator networks, delivering strong, reliable voice and data across offices, hotels, hospitals, and commercial buildings.
CEL-FI GO G43
Enhance 4G LTE and 5G coverage in small buildings and rooms with Nextivity CEL-FI GO G43. This portable, carrier-approved signal booster delivers strong, reliable voice and data for small offices, homes, vehicles, and temporary locations.
Trusted by 300+ clients
SIS Global since 2007 have been trusted by many premiere clients
Offices in 7 Countries
English (UK) 
العربية