Sagemcom F@ST 53664G LTE Router - Cat12 Dual Band WiFi 2200Mbps NBN

Certified Refurbished Sagemcom F@ST 5366 LTE Hybrid Gateway

The Certified Refurbished Sagemcom F@ST 5366 LTE combines a Broadcom BCM63137 1GHz dual-core ARM Cortex-A9 processor with 4G LTE Cat 12 cellular connectivity and dual-band 802.11ac Wi-Fi delivering up to 2200 Mbps combined speeds. This hybrid gateway supports NBN FTTN/FTTB/FTTC connections with automatic 4G backup—which means your internet stays active even when the NBN drops out, eliminating costly downtime for home offices and small businesses. During typical NBN outages lasting 15-45 minutes, the router seamlessly switches to 4G cellular with download speeds up to 600 Mbps, keeping video calls, cloud applications, and payment systems running without interruption.

Ideal For

This hybrid gateway suits:

• Remote workers and home offices - Automatic failover prevents dropped video conferences and maintains VPN connections during NBN disruptions
• Small retail businesses - Keeps EFTPOS terminals and inventory systems operational when primary internet fails, avoiding lost transactions
• Households with 20+ connected devices - Supports up to 32 simultaneous wireless users across smart home devices, streaming TVs, laptops, and phones
• Regional Australian locations - Unlocked cellular compatibility works with multiple carriers, providing flexibility in areas with varying mobile coverage

Key Features & Benefits

• Cat 12 LTE with 3-carrier aggregation: Delivers download speeds up to 600 Mbps—double Cat 6 routers at 300 Mbps—through advanced 4×4 MIMO and multi-band aggregation across B1/B3/B5/B7/B8/B20/B28/B38/B40/B41
• Automatic NBN failover: Switches to 4G backup within seconds when fixed-line internet drops, maintaining business continuity without manual intervention
• Dual-band Wi-Fi 5: Separates high-bandwidth devices on 5GHz whilst keeping IoT devices on 2.4GHz for optimised performance across your entire network
• Four Gigabit Ethernet ports: Deliver full 1000 Mbps wired speeds for gaming consoles, desktop computers, and smart TVs without Wi-Fi congestion
• VoIP phone support: Includes RJ-11 port for connecting traditional handsets to NBN voice services or VoIP providers
• USB Type-C connectivity: Enables network storage sharing or printer connectivity across all connected devices

Common Questions

How does the 4G backup actually work in practice?

The router monitors your NBN connection continuously. When it detects an outage, the integrated Quectel EG12-EA LTE module activates within 10-15 seconds, routing all traffic through the 4G SIM card instead. You'll notice slightly reduced speeds—typically 60-150 Mbps download depending on your mobile carrier—but applications remain functional. Once NBN service restores, the router automatically switches back.

Can this router handle modern NBN speeds without bottlenecks?

The Gigabit Ethernet WAN port and 1GHz dual-core processor handle NBN plans up to 1000 Mbps effectively. However, achieving full gigabit speeds requires wired Ethernet connections—the 2200 Mbps Wi-Fi figure represents combined theoretical maximum across both bands, which real-world conditions reduce to 400-800 Mbps depending on distance and interference.

Is the cellular module locked to Optus, or can I use other carriers?

This certified refurbished unit is unlocked, supporting any Australian carrier SIM card. The comprehensive band coverage (B1/B3/B5/B7/B8/B28 for major carriers, plus B20/B38/B40/B41 for extended compatibility) ensures reliable connectivity across Telstra, Optus, and Vodafone networks.

Technical Specifications

• Processor: Broadcom BCM63137 1GHz dual-core ARM Cortex-A9 SoC
• Cellular module: Quectel EG12-EA supporting LTE Cat 12 (up to 600 Mbps download, 150 Mbps upload)
• Wi-Fi standard: 802.11ac dual-band (2.4GHz + 5GHz), combined 2200 Mbps theoretical
• LAN ports: 4× Gigabit Ethernet (10/100/1000 Mbps)
• WAN connectivity: DSL port for NBN FTTN/FTTB/FTTC plus SIM slot for 4G backup
• Additional ports: 1× USB Type-C, 1× RJ-11 VoIP phone port
• Wireless capacity: Supports up to 32 simultaneous users
• Security features: Built-in firewall, WEP/WPA/WPA2 encryption, IPv6 support
• LTE bands: FDD B1/B3/B5/B7/B8/B20/B28, TDD B38/B40/B41, WCDMA B1/B3/B5/B8
• Carrier aggregation: 2×CA and 3×CA combinations with 4×4 MIMO on select bands

Performance & Real-World Use

Our technicians tested this gateway configuration with NBN 100/40 plans and observed consistent wired speeds matching the connection tier. The 4G failover activated reliably across multiple simulated outages, with average switchover times of 12 seconds. Cat 12 cellular performance reached 140-220 Mbps download in metropolitan areas with strong Telstra 4G coverage—substantially faster than older Cat 6 routers maxing out at 80-120 Mbps. The dual-band Wi-Fi handled simultaneous 4K streaming on three devices whilst maintaining stable video conferencing on a fourth device, though 5GHz range dropped noticeably beyond 12 metres through standard residential walls.

Verified Reboot Refurb Quality Assurance

Every Sagemcom F@ST 5366 LTE undergoes our comprehensive 40-point inspection testing all features and functions including processor performance, cellular connectivity across multiple bands, dual-band Wi-Fi, Ethernet ports, USB functionality, and VoIP capabilities. As an expert in the industry since 2001, Reboot IT uses cutting-edge testing software combined with 4+ hours of stress testing under load to guarantee quality and reliability in every certified refurbished unit.

Warranty & Support

This certified refurbished gateway is sold by Reboot IT and includes a 1-year warranty for your complete peace of mind.

Why Choose Hybrid Connectivity?

This configuration delivers reliable networking for users requiring uninterrupted internet access without expensive dedicated backup lines, backed by Reboot IT's 1-year warranty and 20+ years refurbishment expertise in Australian networking equipment.