Your High-Speed Ticket to the Internet: 4G+ with up to 600 Mbps
No more slow internet in rural areas or as a backup solution. The Cudy LT12 is a state-of-the-art 4G / 5G Routers that, thanks to 4G-Advanced Pro (CAT.12) technology, achieves speeds comparable to many fixed-line connections. Through intelligent bundling of up to three frequency bands (3-Carrier Aggregation) and 4x4 MIMO technology, it maximizes data throughput and ensures a stable, fast connection. Whether for the home office, holiday apartment, or as primary internet access – the LT12 delivers the performance you need.
Maximum Failover Thanks to Dual-SIM and WAN Failover
A stable internet connection is indispensable today. The Cudy LT12 was developed precisely for this. With two Nano-SIM slots, you can use cards from two different providers. If one provider's Network fails, the router automatically switches to the second SIM card without interruption. Additionally, you can connect your existing DSL or fiber optic connection via the configurable WAN port. If this line fails, the 4G connection immediately takes over. This provides double and triple security – ideal for business applications and anyone who cannot afford downtime.
Full Control for Professionals: Band Lock & Advanced VPN Options
The Cudy LT12 is not only fast and reliable but also provides you with tools typically found only in expensive enterprise devices. With the 'Band Lock' function, you can force the router to connect to a specific, high-performance 4G frequency band instead of automatically choosing an overloaded one. TTL adjustment helps bypass provider throttling. In addition, the router offers an impressive variety of integrated VPN clients and servers, including modern protocols like WireGuard and OpenVPN. Secure your entire Network traffic centrally and without additional software on your end devices.
Strong Signal Everywhere: 4x4 MIMO and Removable Antennas
Good reception is the basis for fast internet. The Cudy LT12 is equipped with four powerful, external mobile Antennas. The decisive advantage: they are removable and use a standard SMA connector. This means you can easily connect specialized 4G Outdoor Antennas if needed, to drastically improve the signal even in remote locations or in buildings with thick walls. In combination with the AC1200 Dual-Band WiFi Routers, the strong connection is reliably distributed to all your devices.
Strengths & Notes at a Glance
- Pro: Extremely high failover reliability through dual-SIM and WAN failover.
- Pro: Strong 4G+ performance with 4G CAT.12, 3CA, and 4x4 MIMO (up to 600 Mbps).
- Pro: Professional configuration options like Band Lock and TTL settings.
- Pro: Removable mobile Antennas (SMA connector) for easy signal optimization.
- Pro: Comprehensive VPN support (WireGuard, OpenVPN, IPsec etc.) as Client & Server.
- Note: Uses the proven Wi-Fi 5 (802.11ac) standard, not the newer Wi-Fi 6.
- Note: The frequency bands are optimized for the EU market; compatibility for other regions must be checked.
Specifications & Features
| Manufacturer: | Cudy |
| Model: | LT12 |
| EAN: | 6971690793005 |
| Manufacturer Code: | CUDY_LT12 |
| Device Type: | 4G+ 4G-Advanced Router |
| Mobile Chipset: | Qualcomm |
| 4G Category: | CAT.12 (up to 600 Mbps DL / 150 Mbps UL) |
| 4G Technologies: | 3-Carrier Aggregation (3CA), 4x4 MIMO |
| Supported 4G Bands (EU): | FDD: B1/B3/B5/B7/B8/B20/B28, TDD: B38/B40/B41 |
| 3G Fallback (DC-HSDPA): | Up to 42 Mbps |
| SIM Card Slots: | 2 x Nano-SIM (Dual-SIM Failover) |
| WiFi Standard: | Wi-Fi 5 (802.11ac/n/g/b/a) |
| WiFi Speed: | AC1200 (up to 867 Mbps on 5 GHz + 300 Mbps on 2.4 GHz) |
| WiFi Technology: | Cudy Mesh compatible |
| Mobile Antennas: | 4 x 5 dBi, external, removable |
| Antenna Connector (Mobile): | SMA Male |
| WiFi Antennas: | 2 x 5 dBi, external, fixed |
| Processor: | Dual-Core CPU |
| Ethernet Ports: | 4 x 10/100/1000 Mbps Gigabit |
| Port Configuration: | 1 x WAN/LAN (configurable), 3 x LAN |
| VPN Support: | PPTP, L2TP, OpenVPN, WireGuard, IPsec, Zerotier (Client & Server) |
| DNS Security: | DNS over TLS (DoT) with Cloudflare, Google, NextDNS |
| Advanced Mobile Features: | Band Lock, TTL Settings (IPv4/IPv6) |
| Operating System: | Based on OpenWRT |
| Power Supply: | 12V / 1.5A DC Power Adapter |
| Dimensions (without antennas): | 253 x 152.5 x 48.2 mm |
| Operating Temperature: | 0 °C to 45 °C |
| Certificates: | CE, PSTI |
Scope of Delivery
| 1 x Cudy LT12 4G Router |
| 4 x Removable 4G Antennas |
| 1 x 12V / 1.5A Power Adapter |
| 1 x RJ45 Ethernet Cable |
| 1 x Quick Start Guide |
Frequently Asked Questions (FAQ)
Can I use two SIM cards simultaneously with the Cudy LT12?
No, you cannot use both SIM cards simultaneously for bundled speed. The dual-SIM function is for redundancy (failover). You insert two cards and the router automatically switches to the second card if the first one loses connection, to ensure an uninterrupted internet connection.
Is it possible to connect an external antenna to the Cudy LT12?
Yes, absolutely. The router has four detachable cellular antennas with standard SMA connectors. This is a great advantage, as you can connect external or more powerful outdoor antennas to significantly improve 4G reception in areas with weak signals.
What do 4G CAT.12 and Carrier Aggregation mean?
4G CAT.12 is a high-speed category in the 4G/LTE-Advanced network, enabling theoretical downloads of up to 600 Mbps. Carrier Aggregation (CA) is the key technology behind it: The router can simultaneously receive and bundle up to three different LTE frequency bands from the cell tower, which massively increases the bandwidth and stability of the connection.
Can I also use the Cudy LT12 with my regular DSL or fiber optic connection?
Yes. One of the four Gigabit Ethernet ports can be configured as a WAN port. You can connect your existing modem and use the Cudy LT12 as the main router. The 4G connection then serves as an automatic backup (WAN failover) if your fixed internet line fails.
Does the router support modern VPN services like WireGuard or NordVPN?
What is the 'Band Lock' function and what do I need it for?
With 'Band Lock', you can force the router to use only specific 4G frequency bands. This is useful if your local cell tower offers very high speeds on a particular band, but the router automatically connects to a slower, overloaded band. This way, you can manually force the best performance.
Homepage: https://www.cudy.com
