What happen when your home Internet is down and won’t be available for a while?

Internet has become part of our daily life. Many of our activities involve Internet access. From gaming, online shopping, banking, searching for information and etc. Simply put, it’s really inconvenience and tough when home Internet is not available.

I once had a power outage for several days because of a winter storm. Of course there were no Internet during power outage. The trouble was, there were still no Internet access after power was restored. And it would take ISP provider a week to have their technician came and restore the Internet. Those were the time when you realize how connected we are to the Internet. Without Internet, it has become a huge inconvenience and disrupting our daily routines.

Tethering mobile phone to home network

If you have unlimited data plan and strong signal with your mobile phone, it probably would be a great backup Internet connection for your home. What you need is a router that supports tethering mobile phone. With proper settings, your home network can then connect to this router instead of the ISP router and boom, your home network now has Internet access again.

For some, wireless Internet (using a hotspot wireless device from wireless carrier) may even be a viable option to serve as your primary home Internet connection. It all depends on the availability, pricing, signal strength and stability at your area.

The router I used is ASUS WiFi Router RT-AC3200. It’s a solid router that serves me well mostly as a wireless access point for a couple years. And when needed, paired with my mobile phone to serves as a secondary Internet connection.

There are 2 ways to setup this router to provide Internet connection: usb tethering using router mode or hotspot connection using repeater mode.

Quick note: Wireless carriers may have restrictions on what protocols are allowed. Some services, especially those that require port forwarding may not be working properly.


You would need the latest firmware to have a stable connection and repeater mode method is only available with the latest firmware. Please update your ASUS router to latest firmware first, if needed, before proceeding.

We need a computer to connect to the ASUS router to configure the router. The default IP address of the router is If the IP address is different, login to the router, and manually set the IP address back to

Next is to set computer’s IP address manually to so that they can communicate to each other.

  1. In windows 10, go to Windows Settings > Network & Internet > Change adapter options
  2. right click on the Ethernet adapter, then Properties
  3. select Internet Protocol Version 4 (TCP/IPv4) and click on Properties
  4. Set the static IP address as follow and the click OK.

Optionally, you can use the command ipconfig at a command prompt to verify that the network adapter is assigned the IP address correctly. We can switch back to ‘Obtain an IP address automatically’ once the setup of the switch part is complete.

Both the router & the computer should be isolated from your home network now. Disconnect them from home network. Then connect the computer directly to this router and login to the router at

Method 1: USB tethering using wireless router mode

This method only works for android phones, doesn’t work for iPhones.

tethering - home

If the operation mode is already in ‘Wireless router’ mode, you can skip the next sub-section. Otherwise, we need to switch it to Wireless router mode first.

Switch to Wireless router mode

  • go to Administration > Operation Mode
  • select ‘Wireless router mode’ radio button
  • click ‘Save’
  • wait for the router to update its settings
  • login to the router again and it will do the ‘Quick Internet Setup’
  • select No for ‘Does your Internet connection require user name and password?’ and click ‘Next’
  • then select ‘Automatic IP’ and click ‘Next’
  • Next is Wireless Setting. Just keep your previous settings or quickly enter one. click ‘Apply’ when done.
  • Click ‘Complete’

Your router should now be in ‘Wireless router mode’ as shown below.

tethering - router mode

Connecting the mobile phone

now connect your mobile phone to the top USB port of the ASUS router. Allow permission if your phone requests for permission. Now refresh the browser and your phone should show up as USB device. Turn on USB tethering at your phone.

tethering - usb device

  • go to USB Application > 3G/4G > Internet Connection
  • turn on ‘Enable USB Mode’
  • select ‘Android phone’ for ‘Select USB Device’
  • click ‘Apply’
  • wait for Applying Settings and then login again.

The Secondary WAN should show as ‘Connected’ as shown.

tethering - connected

Method 2: Hotspot using repeater mode

This method should work for both android & iPhone. Turn on mobile hotspot on your cell phone first.

  • go to Administration > Operation Mode
  • select ‘Repeater mode’ radio button
  • a list of available SSIDs should appear. select your mobile hotspot.
  • enter the mobile hotspot’s password, then click ‘Connect’
  • ‘LAN IP Setting’ screen will show up. Let it obtain info automatically. Simply click ‘Next’.
  • Next is Wireless Setting. Just use default settings or quickly enter one. click ‘Apply’ when done.
  • wait for the router to connect to the hotspot

tethering - hotspot connected

Once the router finished connecting, your computer should be able to connect to the Internet. However, the router will obtain a different IP address from the mobile hotspot. As a result, you would need to find the IP address in order to connect to the router’s configuration webpage. For android, you can find the router’s IP address at the cell phone hotspot’s connected device. For iPhone, however, there’s no information about that. You would need to use a network scanner or ASUS device discovery utility. Or when you disconnect the mobile hotspot, the router will reset it’s IP address to

This Post Has 4 Comments

  1. This worked flawlessly (I have the same router) and saved me after lightning killed my cable modem. I had been curious about this for years – thanks very much for this.

    1. Sorry to hear that your cable modem was fried but glad that this guide is helpful for you. Cheers

  2. I didn’t see the 3G/4G > Internet Connection, what should I do?

    1. The probably mean your router doesn’t support it. Double check with your router’s manual.

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