The Huawei E3372s can be used as internet failover in combination with a FRITZ!Box, meaning that the FRITZ!Box will automatically route your data traffic via the Huawei E3372s if your edpnet internet connection fails, and vice versa when it’s restored. The Huawei E3372s is not eligible for use with your laptop or tablet.

A Huawei E3372 / Telekom Speedstick LTE V mobile broadband modem USB stick is easily installed on macOS 10.12 Sierra and macOS 10.13 High Sierra without using Mobile Partner software and despite Apple s System Integrity Protection csrutil. Huawei CPE E3372 firmware summary (existing versions) AngryBird Created: Aug 13, 2019 10:04:58 Latest reply: Oct 6, 2020 13: 12 4 0 display all floors display all floors #1. 2- Download & extract Huawei Mobile Stock firmware & copy the UPDATE.APP file on dload folder. 3- In your Huawei Mobile, Open the dialer and enter:.#.#2846579#.#. ProjectMenu = Software Upgrade = SDCard Upgrade = OK; 4- Select the Update.app that you copy on your phone storage or in your SD card. Huawei USB Driver is a considerable part to get a fantastic many android devices which gives you the ability to connect any android device or tablet during the personal computer or notebook. If you can’t locate the appropriate driver for your Huawei Mobile, then you can ask for the driver.

Note: The Huawei E3372s supports 4G LTE, 3G UMTS, 2G GSM. Neither a SIM card nor a mobile internet subscription is included. The stick is unlocked: you can use a data SIM card from the mobile operator of your choice!

Prepare the Huawei E3372s for use

Once you have received your Huawei E3372s, you will need to insert a SIM card into it. As mentioned before, you can use a SIM card from a mobile operator of your choice.

Insert the Huawei E3372s in the FRITZ!Box

I have a FRITZ!Box 7430

With a FRITZ!Box 7430 you should plug the Huawei E3372s into the appropriate USB slot on the side of the modem.

I have a FRITZ!Box 7490

With a FRITZ!Box 7490 you can choose which of the 2 USB slots to use (on the side and on the back of the device).

I have a FRITZ!Box 7530

With a FRITZ!Box 7530 you should plug the Huawei E3372s into the appropriate USB slot on the side of the modem.

Configure the Huawei E3372s using the FRITZ!Box web interface

Open your web browser (Internet Explorer, Firefox,…) and go to the web interface of your FRITZ!Box. By default, it should be reachable on http://fritz.box or http://192.168.178.1. Log into the device if you are prompted to. Within a few minutes after you put the Huawei E3372s in the USB slot, the FRITZ!Box will automatically recognize it:

As soon as this happens, click on Internet in the left menu and select Mobile Communications in a drop-down menu. Choose the option Automatically activate the mobile connection when the DSL connection is interrupted:

Now you should enter the PIN code of the SIM card:

Under Internet Connection, choose the Other operator as Mobile communications network provider and fill in Access Point, Access Number, User name and Password fields. This information depends on the mobile operator you use. Although you may find these details on the website of your mobile operator, the fastest way is to contact their customer service.

After you have received the necessary data from your mobile operator and have entered it in the FRITZ!Box, press Apply to continue. If you have entered all the required data correctly, the Huawei E3372s will be ready to provide failover in case the fixed edpnet internet connection would fail.

Under Network Availability you will be able to check the strength of the mobile signal:

The Huawei E3372s is a Category 4 USB stick. This means that you can benefit from theoretical speeds of up to 150 Mbps in downstream and up to 50 Mbps in upstream. The actual speed depends on the coverage of the mobile network, which can be affected by various factors: the relief of the terrain (whether it’s flat or hilly), the obstacles and the environment around the mobile network base station, the signal between the terminal device and the base station, the load on the mobile network (number of active users and used applications), indoor reception…

It appears that Huawei E3372 frequently disconnects from the LTE network for no apparent reason. It wouldn't be much of a problem if it managed to quickly and reliably reconnect, but that isn't the case it would seem. Whenever that happens packets get lost and websites don't load properly, and overall internet experience is well below acceptable. After some googling it turned out that it might be caused by E3372 automatically disconnecting from the network, but fortunately enough, automatic disconnects when idling seem to be a configurable feature [sic] in the HiLink version of the modem. Less fortunately though, the default interval is set to 5 minutes, and obviously needs to be changed, potentially even disabled altogether. Let's see what the WebUI has to offer in this regard:

Oh...

(ノ `⌒´)ノ︵ ┻━┻

Let's figure this thing out, shall we? Here are my device's versions:

Hardware version: CL2E3372HM
Software version: 22.315.01.00.1080
Web UI version: 17.100.13.02.1080

So, when applying the settings with auto-disconnect interval set to 120 minutes we're making a request to /api/dialup/connection endpoint on the device (parts of the request were truncated for brevity):

And the data:

As we can see, the actual time, MaxIdelTime [sic], is represented as seconds instead of minutes, so 7200 seconds instead of 120 minutes. Other than that, there's not much more we need to spoof - just a SessionID and __RequestVerificationToken.

SessionID is pretty easy, if your device has user login disabled you've already got it as a Set-Cookie header when fetching any of the HTML pages, but that the crap is __RequestVerificationToken? Well, of course it's a way of authorizing the requests, if we omit it the request will be rejected with an error, but where do we get it from?

Looking through the dozens upon dozens of requests that the WebUI constantly makes, we can find two promising leads:

/api/user/hilink_login
/api/webserver/publickey

Huawei E3372 Unlock software, free download

Unfortunately, both of these are a dead end, the first one does, well, nothing and the second one retrieves an RSA public key from the backend - perhaps it's being used for signing something so that backend knows that the request is valid?

Looking through the dozens upon dozens of global JavaScript variables that the WebUI constantly uses, we can find several gems:

Not just one, but TWO implementations of base64 encoding. Redundancy is key. ( ͡° ͜ʖ ͡°)

It appears that /api/webserver/publickey is used for some sort of custom encryption. It's always nice to roll your own, custom crypto on the frontend while connecting via unencrypted HTTP. ( ͡° ͜ʖ ͡°) But fear not! Even though g_moduleswitch.encrypt_enabled is set to '1', this custom encryption appears to never be used anyway, since the only callee of doRSAEncrypt() checks if options.enc passed via arguments is set, which obviously isn't. Never. Ever. ( ͡° ͜ʖ ͡°)

There are some shenanigans going on with passwords as well. Is that... Is that salting? Good thing it's on frontend, on an unencrypted connection with g_password_type set to 0, instead of 4. ( ͡° ͜ʖ ͡°)

OK, let's stop right here, cause I'm getting carried away. Looking though the sources we can find several more dead-end leads such as the /api/webserver/token endpoint which sounds promising but appears to require preexisting __RequestVerificationToken in addition to never being used in the first place...

We must be missing something, since the g_reques

Prepare the Huawei E3372s for use

Insert the Huawei E3372s in the FRITZ!Box

Configure the Huawei E3372s using the FRITZ!Box web interface

See also:

Huawei E3372 Unlock software, free download

Huawei E3372 Software