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Huawei B612s-51d GSM Unlocked 4G LTE CPE Mobile Sim Wi-Fi Router (Used)

  • High-speed 4G LTE router with GSM unlocked.
  • Supports up to thirty-two devices simultaneously connected.
  • Dual external antenna ports enhance signal strength.
  • Compatible with all Pakistani cellular network bands.
  • Built-in VoIP phone port with RJ11 connectivity.
  • Huawei HiLink App enables remote router management.
  • Four LAN ports for flexible wired internet connections.
  • Perfect router choice for home or small office.
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 8,500  20,000

Best Price on Huawei B612s-51d GSM Unlocked 4G LTE CPE Mobile Sim Wi-Fi Router In Pakistan

The Huawei B612s-51d is a 4G LTE Category 6 CPE sim router, designed for fast, stable, and high-performance wireless internet. With support for up to 32 connected devices, this router is ideal for home, office, and even remote usage.

It offers unlocked GSM compatibility, meaning it supports all major cellular networks in Pakistan, including Jazz, Zong, Telenor, and Ufone.

âś… Key Features of Huawei B612s-51d

Feature Details
Model Huawei B612s-51d
Network Support 4G LTE / 3G / 2G
Max Download Speed Up to 300 Mbps (LTE FDD)
Wi-Fi Standard 802.11 b/g/n (up to 300 Mbps)
Device Connections Up to 32 users simultaneously
External Antenna Support Yes (2x SMA Ports)
SIM Type Micro SIM
VoIP / VoLTE Support Yes (Customizable via RJ11 Port)
LAN Ports 4 (3 LAN + 1 LAN/WAN)
Phone Port 1 x RJ11
IPv4/IPv6 Support Dual Stack
Mobile App Huawei HiLink App Support
Security Features NAT, DHCP, DNS Relay, Firewall, WPS 2.0
Power Supply DC 12V / 1A
Weight Approx. 430g

Frequency Band Support: B612s-51d vs. B612s-25d

Huawei released two versions of the B612 model: B612s-51d and B612s-25d. Here’s how they differ in terms of band support:

Band Type B612s-51d B612s-25d
LTE Bands B2 / B4 / B5 / B7 / B41 (2545–2655 MHz) B1 / B3 / B7 / B8 / B20 / B38 / B40 / B41 / B42 / B43
3G Bands B1 / B2 / B5 B1 / B8
2G Bands B2 / B3 / B5 / B8 B2 / B3 / B5 / B8
4×4 MIMO Not specified Supported on select bands (B3/B7/B20/B38/B40/etc.)

Note: For users in Pakistan, where LTE bands B3, B5, and B8 are commonly used, the B612s-51d provides solid coverage and is often the preferred model due to better support for local carriers.

Performance and Speed Benchmarks

With LTE Category 6 capabilities, the Huawei B612s-51d offers:

Network Type Download Speed Upload Speed
LTE FDD Up to 300 Mbps Up to 50 Mbps
LTE TDD Up to 210 Mbps Up to 10 Mbps
DC-HSPA+ Up to 42 Mbps Up to 5.76 Mbps
HSPA+ (MIMO) Up to 28 Mbps Up to 5.76 Mbps
EDGE/GPRS 296 / 85.6 kbps 236.8 / 85.6 kbps

This performance is sufficient for HD video streaming, online gaming, Zoom meetings, and remote work — even with multiple users.

Ports and Connectivity

The Huawei B612s-51d comes with a wide range of ports for flexible connectivity:

Port Type Quantity Use Case
LAN Ports (RJ45) 3 Connect desktops, smart TVs, etc.
LAN/WAN Port 1 Use as primary or backup WAN connection
Phone Port (RJ11) 1 Connect landline or VoIP phone
External Antenna 2 (SMA) Enhance signal reception
Micro SIM Slot 1 Insert your SIM card

Mobile App Control with Huawei HiLink

With support for the Huawei HiLink App, users can easily:

  • Monitor real-time signal strength

  • Change SSID and password

  • Set data limits

  • View connected devices

  • Reboot the router remotely

  • Manage SMS

This level of control makes it easy even for non-technical users to manage their internet connection.

️ Security and Stability

Security is a priority with the Huawei B612 sim router. Features include:

  • Built-in NAT Firewall

  • WPA/WPA2 encryption

  • MAC address filtering

  • DHCP server with IP reservation

  • DNS relay and port forwarding

  • WPS 2.0 for secure one-click connections

Whether you’re using it in a home or office environment, these features provide a safe and reliable browsing experience.

️ Environmental Specifications

Parameter Range
Working Temp. 0°C to 40°C
Storage Temp. -20°C to +70°C
Humidity 5% – 95% (Non-condensing)
Power Consumption Less than 12W
Dimensions 240mm Ă— 155mm Ă— 78mm

These make it suitable for use in various environments — from homes in Karachi to remote locations in Balochistan.

Best Price in Pakistan

The Huawei B612s-51d is readily available across Pakistan, and prices vary depending on the seller, warranty, and accessories included. As of October 2025, here’s an approximate price range:

Vendor Type Expected Price (PKR)
Authorized Dealers Rs. 18,500 – Rs. 22,000
Online Retailers Rs. 17,999 – Rs. 20,000
Used / Refurbished Rs. 13,000 – Rs. 16,000

Tip: Always buy from a trusted seller and ensure the device is GSM Sim unlocked and comes with a warranty or return policy.

Conclusion: Why Huawei B612s-51d is the Best Choice

The Huawei B612s-51d offers superior performance, network compatibility, and user-friendly features at a highly competitive price. Its ability to support 32 devices, VoIP calling, and 4G LTE Cat 6 speeds make it a top-tier CPE router for Pakistani users.

Whether you’re streaming, gaming, working remotely, or running a small office, the B612s-51d delivers consistent performance you can rely on.

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