Cudy 4G LTE Cat 12 WiFi Router - Dual SIM, AC1200 Performance

Our review of the Cudy 4G LTE Cat 12 WiFi Router finds it best suited for small offices, remote sites, and households that need a resilient cellular backup or primary internet link. The single biggest reason to buy is its combination of fast LTE Cat 12 speeds and practical redundancy: dual SIM slots plus WAN failover provide a reliable connection when wired service is unreliable or unavailable. Setup is straightforward and the router balances cellular and Wi-Fi performance without a steep learning curve.

Key Features

• LTE Cat 12: Delivers up to 600/150 Mbps theoretical throughput to support streaming, remote work, and multiple users.
• 4x4 MIMO antennas: Built-in high-performance cellular antennas expand coverage and improve real-world signal stability in fringe areas.
• Dual SIM and WAN failover: Provides automatic redundancy so the router stays online by switching between SIMs or falling back to WAN.
• Dual band AC1200 Wi-Fi: Offers simultaneous 2.4 GHz and 5 GHz wireless for mixed device environments and reduced interference.
• Multiple VPN clients: Supports OpenVPN, WireGuard and other VPNs to encrypt traffic and connect remote cameras or networks securely.
• External antenna option: Detachable SMA cellular connector lets you attach an outdoor antenna to boost reception where needed.

Who It's For

This router is ideal for small businesses, home offices, and remote workers who need a dependable cellular internet option with router-level features like VPN, failover, and multiple LAN ports. It also suits users who want the flexibility to use an external cellular antenna to reach weak signals without replacing the entire device.

Those who require carrier-certified, region-specific band support should verify band compatibility before purchase; users who need the absolute fastest fiber speeds or an all-in-one mesh Wi-Fi system for very large homes may want to consider different devices tailored to those needs.

Pros & Cons

Pros

• Robust cellular connectivity with Cat 12 LTE and 4x4 MIMO for better throughput and coverage.
• Reliable uptime thanks to dual SIM and WAN failover, which keeps networks online during outages.
• Useful VPN support including OpenVPN and WireGuard for secure remote access and camera management.

Cons

• Regional frequency support varies, so buyers must confirm band compatibility for their area.
• The device is a conventional router rather than a mesh system, so coverage improvements rely on antenna placement or external gear.

Specifications

Model	Cudy 4G LTE Cat 12 WiFi Router
Cellular Standard	4G LTE Cat 12 (LTE-A Pro)
Peak Data Rate	Up to 600/150 Mbps (theoretical)
Wi-Fi	AC1200 dual band (2.4 GHz + 5 GHz)
Antennas	4 x 5dBi cellular (detachable) + 2 x 5dBi Wi-Fi
SIM/WAN	Dual SIM slots with WAN failover and selectable WAN/LAN port
VPN	PPTP, L2TP, OpenVPN, WireGuard, IPsec, Zerotier

Our Verdict

The Cudy 4G LTE Cat 12 router is a practical choice for users who need reliable cellular internet with router-grade features. Its dual SIM failover, external antenna option, and VPN support make it a good value for remote sites and small offices that value uptime and secure remote access.

Frequently Asked Questions

Will this work with my carrier?
Check the supported frequency bands for the specific regional model before buying, since band support varies by region.

Can I attach an outdoor antenna?
Yes, the cellular antennas are detachable and an SMA connector allows an external antenna for improved reception.

Does it support secure remote connections?
Yes, it supports OpenVPN, WireGuard and other VPN clients to secure traffic and connect remote devices.