Dual SIM LTE 4G / 5G H721 Router – Build and Configuration Instructions

exclusive version wodaplug.com a.k.a. www.524wifi.com with 11ac WiFi

more informationes and files at: wifi5.eu

This tutorial will demonstrate the build and configuration process for the M2M 5G LTE H721 Dual Modem Router.

UPDATE 2020: There are numerous versions of the similar M2M Dual-Q H721 (and under other private labeling/branding) Dual Sim 5G 4G Dual Modem routers being sold that are defective. There is no voltage protection between the power source and modem slots at some noname versions. It is strongly recommended to avoid these routers at all cost–these routers will toast a modem.

Please note, Wodaplug ( 524wifi.com ) are using V6 unique rebuild version of this popular modem for full 5G equiped with protection, pls note – some pictures of older versions may be not coresponding to your newer model. Good new also is that we just finish 5G_NR signal status page and Simcom 8200 5G modem support.

5G Signal information displayed by our router

There are many possible build variations for building the M2M. Autor decided to use a single EM7565 CAT12 M.2 modem and dual mini PCI-E WiFi cards—one for 2.4GHz and the other for 5GHz WiFi.

The WiFi cards used in this build are dual band cards, but each card may only operate on one band at a time—either 2.4GHz or 5GHz. The QCA AC WiFi card will work well for its higher speed capabilities on the 5GHz WiFi, while the Atheros WiFi card will handle the 2.4GHz WiFi. New firmware support Ath10k 802.11AC Wave2, about 20% improvement at Wifi 5.8G support QCA9984 QCA9886 QCA9888

The components used for this particular build are:

(1) Wodaplug M2M Dual-Q H721 Dual Modem Router .

Modem and Pigtail Cables:

WiFi Cards and Pigtails:


Power Supply:

  • (1)12 Volt 2.5 Amp Power Adapter

Tools Required for Assembly:

  • (1) Small Phillips Head Screwdriver
    (1) Small Standard Head Screwdriver
    (1) 5/16 Nut Driver, Socket or Wrench
    (1) Wooden Chopstick with Tip Sanded Flat (or similar object to use for connector attachments)


There are seven screws in total to remove before separating the router case. This is required to obtain access to the router PCB to install the Modem, WiFi Cards and Pigtail connectors.

Place the router on a flat table or surface with the lower case decal facing up.

Remove the three screws along the upper edge.

Remove the two screws from each side of the router.

1. Remove case screws.png

After removing all seven screws, carefully slide the lower case back about an inch from the upper case.

2. Slide back lower case.png

Hold the lower and upper case in their position and carefully flip the router into its upright position.

3. Place router in upright position.png

Remove the Upper Case from the router assembly to expose the PCB (Printed Circuit Board).

The EM7565 is be mounted in the M.2 interface slot labeled #3

The 5 Volt WiFi Card is to be mounted in the Mini PCI-E interface slot labeled #2 since it supports both 3.3 and 5 Volt WiFi Cards.

The Atheros WiFi Card is to be mounted in the Mini PCI-E interface slot labeled #1

(Note: The M.2 interface slot #4 on the underside of the PCB for a second modem is not being used for this build).

Carefully slide each of the modem and WiFi cards into their proper interface slot—paying special attention to the proper key/pin alignments—and secure each of the cards in place with the screws that are included (shown in the red circles):

4. Remove router upper case.png


There are 12 different antenna cutouts and plastic plugs that should accommodate most any antenna configuration. Decide what antenna placements work best for a particular build.

Below is the antenna configuration used for this build which works rather well.

5. Antenna placements.png

Remove the plastic plugs from both upper and lower case to be used for the antennas.

6. Removing plastic plug.png

Place each of the WiFi RP-SMA and Cellular (LTE) SMA antenna pigtail connectors into their proper cutout slot.

Consideration should be given as to the length of cable being used in relation to the location of the WiFi card or modem it will be connected to.

7. Antenna connectors.png

Notice that the SMA and RP-SMA antenna connectors appear similar, but they are different. One is not compatible with the other. Generally, WiFi uses RP-SMA while cellular uses SMA. The differences can be seen on the following image:

7a. SMA vs RP-SMA Connectors.png

Place the star and lock washers over the connector and secure in place with the nut. Use the 5/16 nut driver to snug the connector nut—but do not over-tighten.

8. Antenna connectors installed.png

Now the modem and WiFi cards are installed and secured in place with their screws, and the pigtail connectors are installed in the upper and lower case, it is time to install the pigtail’s U.FL and MHF4 connectors to the cards.

Care must be exercised when working with these connectors to avoid damaging the tiny connectors or ports on the modem. Good lighting is crucial and a magnifying glass will be extremely useful.

9. Position cases for connector installation.png

When connecting these connectors, make certain they are flat and aligned perfectly with the connector port of the modem. A flat instrument placed on top of the connector (the wooden chopstick in this example) will help to snap the connector evenly in place.

Do not force the connects. If they do not snap/pop into place with slight downward pressure, chances are the connector and port are not aligned.

10. Installing connectors.png

Once the connectors are installed, the Selector Switch on the PCB must be set for this particular configuration. According to the documentation, when using the M.2 slot #3 for the modem, and a WiFi Card in the Mini PCI-E slot #1, the Switch should be in the down position:

11. Switch selector.jpg Switch selector (optional – depends on model – wodaplug.com new V5G version does NOT have switch)

Confirm the switch is in the down position (for older HW versions only):

12. Switch in down position.png

The Upper and Lower cases may now be reassembled and secured with the seven screws.

The antennas may also be installed in their proper positioning.

13. Antennas assembled.png


The M2M NEXG H721 Dual Modem Router comes with GoldenOrb firmware preinstalled which helps to simplify the overall router build and configuration.

Plug the 12 Volt power supply into the power plug on the router.

Connect an Ethernet cable from one of the LAN ports on the router to the Ethernet plug on the PC.

(Note which SIM Card slot will be used for the EM7565 but DO NOT install the SIM Card until after GoldenOrb is configured and ready to connect to the internet).

1. LAN - SIM - Power.png

1. LAN – SIM – Power

Once the M2M router has booted up, open a web browser and enter in the address bar and press enter. The Splash Page should appear. Click on the “Router Login”:

2. Router splash page.png

2. Router splash page

Log into the router using the default user name “root” (without the ““marks) and the default password of “admin”.

The default user name and password is located on the decal on the bottom of the router.

3. Router Login.png

3. Router Login

Once logged in, the Overview screen should appear.

4. Overview screen.png

4. Overview screen

From the left side tabs, select System > System > General Settings.

Use the Time Zone down arrow and select the proper time zone.

Click on the Sync With Browser button.

Click Save and Apply.

(Important, any change in a GoldenOrb setting must be Saved and Applied to implement and remember the change).

5. Time zone.png

5. Time zone

Go to Modem > Connection Profile > General > APN

APN stands for Access Point Name, which is required to identify and connect to a specific cellular carrier. Each carrier uses a different APN.

Type the correct APN used by your cellular carrier that is tied to the SIM Card and plan to be used in the M2M router.

Click on Save & Apply.

A few of the more common carrier APNs are listed below:

Sprint = R.ISPSN (or, N.ISPSN on some)

6. Setting APN.png

6. Setting APN

For dual-modem and dual-sim, you need custom fprofile , bounding modem id imei ,imsi or other. you can refer to this link :https://www.ofmodemsandmen.com/modemconfig.html

New firmware can support load balance and fail over redundandcy – you can reference this topic :https://www.ofmodemsandmen.com/loadbalancing.html

Go to System > Administration > Router Password and enter a password that will be used to log into GoldenOrb.

Some may prefer to skip this step and leave the default password of “admin”. This may be changed after all of the other configurations are made and the router is connected to the internet.

7. Setting login password.png

7. Setting login password

It is now time to configure the WiFi. Go to Network > Wireless.

The Wireless Overview screen will appear and show the WiFi cards installed in the router. In this build, Radio0 is the Atheros card used for the 2.4GHz WiFi network.

Click on the Radio0 Master tab at the top left of the screen.

8. Select Wireless Network Radio0.png

8. Select Wireless Network Radio0

Select the Mode and Channel that the 2.4GHz network is to operate on.

In this case, N is selected for the Mode and Channel 11 is used since it has little traffic on that channel.

The Channel can be changed to another channel if the one selected becomes too congested.

There are WiFi analyzer apps that can be downloaded onto your smart phone to assist in selecting the best, non-congested channel available at your location.

Enter the ESSID that the 2.4GHz WiFi Network will be named. In this build TestHome was used.

9. Configure Atheros Radio0 2.4GHz 1 .png

9. Configure Atheros Radio0 2.4GHz 1

Click on the Wireless Security tab in the lower part of the Interface Configuration screen.

Select the Encryption to be used by selecting the down arrow. In this case WPA2-PSK is selected.

Under Key, enter the Password that will be used to Log onto the 2.4Ghz WiFi Network.

Click Save & Apply to save setting.

10. 2.4GHz WiFi Password and Encryption.png

Next is to configure the 5GHz WiFi. Go to Network > Wireless and select the Radio1 Master from the top of the menu.

Radio1 is the Complex card used in this build.

11. Select Wireless Network Radio1.png

11. Select Wireless Network Radio1

Select Mode and Channel that 5Ghz WiFi network is to operate on.

In this case, AC for the Mode and Channel 36 was selected since there is little traffic on this channel. This can be changed to another channel if this one becomes too congested.

Again, a WiFi Analyzer app will help make the proper selection.

Enter the ESSID that the 5GHz WiFi Network will be named. In this case TestHome5G was used.

12. Configure Complex Radio1 5GHz 1 .png

12. Configure WiFi Radio1 5GHz 1

Click on the Wireless Security tab in the lower part of the Interface Configuration screen.

Select the Encryption to be used by selecting the down arrow. In this case WPA2-PSK is selected.

Under Key, enter the Password that will be used to Log onto the 5Ghz WiFi Network.

Click Save & Apply to save setting.

13. 5GHz WiFi Password and Encryption.png

13. 5GHz WiFi Password and Encryption

Optional: For users who may have limits imposed by their carrier on the amount of hotspot data that may be used on a monthly basis, my want to use the TTL custom settings.

Go to Network > Firewall > Custom TTL Settings (top of the screen) > Enable > set to 65 > Save & Apply.

14. TTL Settings.png

14. TTL Settings

Assuming all of the settings are properly configured, you should now be ready to connect to the internet.
Unplug power from the router, install an activated SIM Card, plug the power back in and give it a minute or two to connect.

15. DUAL MODEM and DUAL SIM application:

For dual-modem and dual-sim, you need custom fprofile , bounding modem id imei ,imsi or other. you can refer to this link :https://www.ofmodemsandmen.com/modemconfig.html

New firmware can support load balance and fail over redundandcy – you can reference this topic :https://www.ofmodemsandmen.com/loadbalancing.html