JS Code To Disable WiFi for T-Mobile 5G Home Internet Router

disable-tmobile-5g-home-internet-rotuer-wifi.md

This script can be copied into the browser console and used to disable wifi on the T-Mobile 5G Home Internet router. The web interface for the router doesn't allow you to disable it.

Steps

1. Go to http://192.168.12.1
2. Open dev console (on mac [cmd]+[opt]+i)
3. Copy the code from the below JS file and with the password value updated to be your actual password and hit enter
4. Call the code by typing tmobileHomeInternetDisableWifi() and hitting enter

disable-tmobile-5g-home-internet-router-wifi.js

async function tmobileHomeInternetDisableWifi() {
  const username = 'admin'
  const password = 'REPLACE-WITH-REAL-PASSWORD' // <<------- Make sure to replace this

  async function loginTmobile(username, password) {
    const resp = await fetch("http://192.168.12.1/TMI/v1/auth/login", {
      "headers": {
        "accept": "application/json",
        "accept-language": "en-US,en;q=0.9",
        "cache-control": "max-age=0",
        "content-type": "text/plain;charset=UTF-8"
      },
      "referrer": "http://192.168.12.1/home",
      "referrerPolicy": "strict-origin-when-cross-origin",
      // "body": "{\"username\":\"admin\",\"password\":\"tug.ecologist.cover.facility\"}",
      body: JSON.stringify({ username, password }),
      "method": "POST",
      "mode": "cors",
      "credentials": "include"
    });

    console.log('resp', { headers: resp.headers })

    if (resp.ok) {
      const jsonValue = await resp.json(); // Get JSON value from the response body
      const authToken  = jsonValue?.auth?.token
      return Promise.resolve(authToken);
    } else {
      return Promise.reject('Failed to get JSON respon value');
    }
  }

  async function getAccessPointConfig(authToken) {
    const resp = await fetch("http://192.168.12.1/TMI/v1/network/configuration?get=ap", {
      headers: {
        "accept": "application/json",
        "accept-language": "en-US,en;q=0.9",
        "authorization": `Bearer ${authToken}`,
        "cache-control": "max-age=0"
      },
      referrer: "http://192.168.12.1/networks",
      referrerPolicy: "strict-origin-when-cross-origin",
      body: null,
      method: "GET",
      mode: "cors",
      credentials: "include"
    });

    console.log('ap config resp', resp)

    if (resp.ok) {
      const jsonValue = await resp.json(); // Get JSON value from the response body
      return Promise.resolve(jsonValue);
    } else {
      return Promise.reject('Failed to get JSON respon value');
    }
  }

  function disableWifiProps(apConfig) {
    const configWifiOff = {
      ...apConfig,
      '2.4ghz': { ...apConfig['2.4ghz'], isRadioEnabled: false },
      '5.0ghz': { ...apConfig['5.0ghz'], isRadioEnabled: false },
    }
    console.log('configWifiOff', configWifiOff)
    return configWifiOff
  }

  async function disableAccessPointWifi(authToken) {
    const apConfig = await getAccessPointConfig(authToken)
    const wifiOffConfig = disableWifiProps(apConfig)

    const resp = await fetch("http://192.168.12.1/TMI/v1/network/configuration?set=ap", {
      headers: {
        "accept": "application/json",
        "accept-language": "en-US,en;q=0.9",
        "authorization": `Bearer ${authToken}`,
        "cache-control": "max-age=0",
        "content-type": "text/plain;charset=UTF-8"
      },
      referrer: "http://192.168.12.1/networks",
      referrerPolicy: "strict-origin-when-cross-origin",
      body: JSON.stringify(wifiOffConfig),
      method: "POST",
      mode: "cors",
      credentials: "include"
    });

    console.log('ap config resp', resp)

    if (resp.ok) {
      const jsonValue = await resp.json(); // Get JSON value from the response body
      return Promise.resolve(jsonValue);
    } else {
      return Promise.reject('Failed to get JSON respon value');
    }
  }

  const authToken = await loginTmobile(username, password)
  const result = await disableAccessPointWifi(authToken)
  return result
}

Does the code work for the Sagemcom Fast 5688W Gateway?
Ran into the following error

"VM107:1  Uncaught (in promise) SyntaxError: Unexpected end of JSON input
    at disableAccessPointWifi (<anonymous>:92:36)
    at async tmobileHomeInternetDisableWifi (<anonymous>:100:18)"

However, even before I ran the code, I can already see that isRadioEnabled is false on both 2.4 and 5Ghz because I set the WiFi network to hidden (within the android T Mobile Home Internet app).
GET http://192.168.12.1/TMI/v1/network/configuration?get=ap and returned the following
{"2.4ghz":{"isRadioEnabled":false..},"5.0ghz":{"isRadioEnabled":false..}}