MERCUSYS MB135-4G 4G LTE AC1200 Dual-Band Router

AC1200: The MERCUSYS MB135-4G is a 4G LTE router that shares a mobile broadband connection over dual-band Wi-Fi or Ethernet. It can also use an Ethernet WAN connection, making it relevant for homes or temporary locations that need cellular internet or a WAN alternative.

At a glance

Insert an activated, unlocked Nano SIM to share 4G LTE internet over Wi-Fi and Ethernet.
The LAN/WAN port can take an Ethernet WAN connection in Wireless Router Mode, as an alternative to cellular service.
The listing recommends a limit of 32 connected devices for everyday performance, although it claims support for up to 64.

Price

$99.99Save 17%

Reference price: ~~$119.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

The dual WAN options suit locations where mobile broadband is primary and Ethernet internet is available as an alternative.
Detachable LTE antennas can be replaced with higher-power alternatives where supported.
App or web-interface management is listed for features including QoS, guest networks, parental controls and data limits.

Cons

The cellular connection is 4G LTE Cat 4, with listed maximums of 150 Mbps down and 50 Mbps up, rather than 5G service.
The listing recommends limiting connected devices to 32 for better everyday performance, below its stated maximum of 64.

Technical specifications

16 specifications

Identity
Brand	MERCUSYS
Model	MB135-4G

Mobile and wireless connectivity
Maximum cellular download speed	150 Mbps
Maximum cellular upload speed	50 Mbps
Wi-Fi standard	802.11ac
Wi-Fi bands	Dual-Band
Maximum 5 GHz Wi-Fi speed	867 Mbps
Maximum 2.4 GHz Wi-Fi speed	300 Mbps
SIM type	Nano SIM

Ports and device capacity
Maximum Wi-Fi devices	64
Recommended Wi-Fi device limit	32

Antennas and controls
Antenna arrangement	2 detachable external 4G LTE antennas and 2 external WiFi antennas
Wireless connection listed	Wi-Fi
Control methods listed	App

Dimensions and installation
Dimensions and weight	22.2 x 14 x 3.2 cm; 280 g
Weight listed separately	0.28 kg

What to know before buying

The stated speeds are maximums, not guaranteed results. LTE service depends on carrier support and regional band compatibility, and Wi-Fi rates are listed separately from cellular rates. An activated unlocked Nano SIM is required. The listing describes four Ethernet ports as Fast Ethernet, so buyers needing faster wired connections should check this limitation.

What’s in the box

Included

MB135-4G router

Who is it for?

A good fit for

Homes or holiday properties using 4G LTE as their main internet connection.
Remote work or temporary locations where an activated Nano SIM can provide internet access.
Households wanting an LTE router with an Ethernet WAN alternative and app-managed network features.

Less suited to

Buyers who require 5G cellular service or higher than the listed Cat 4 LTE speeds.
Setups that need gigabit Ethernet ports or a recommended wireless client limit above 32.

MERCUSYS MB135-4G 4G LTE AC1200 Dual-Band Router · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 1 ratings

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The supplied rating evidence is a single five-star rating, too small a sample to establish a broader customer consensus or identify specific strengths and concerns.