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Sometimes—but it depends on what has failed. If your router’s Wi-Fi is still working and only internet access is down, your phone and Chromecast may still communicate locally, although the app or video service may require internet. If the Wi-Fi network itself is unavailable, ordinary casting cannot work until both devices join another shared network. A mobile hotspot may help, but compatibility depends on the devices and app.
First check whether Wi-Fi or only internet access is down
Wi-Fi is the local network connecting your phone and Chromecast. Internet access is the router’s connection to online services. Google’s usual Cast setup requires the sending device and Chromecast to be on the same Wi-Fi network; that local requirement does not mean every streaming app can play without internet. Google’s casting instructions describe the normal shared-network flow, but do not promise universal offline playback.
| What stopped working | What to try | What may still prevent playback |
|---|---|---|
| Internet access, while the router’s Wi-Fi remains available | Leave your phone and Chromecast connected to that same Wi-Fi network, then try the content. | The app may need internet to reach its service, authenticate, or play a particular title. |
| The Wi-Fi network itself is unavailable | Connect both devices to another common Wi-Fi network, if available. | Without a shared network, the usual casting setup cannot proceed; a hotspot is not guaranteed to work with every setup. |
For downloaded titles or app-specific offline behavior, check the app’s current instructions. Google’s general Cast guidance does not establish whether a particular download can be cast offline.
If the router’s Wi-Fi is still up, try casting over the local network
Keep the phone and Chromecast on the same Wi-Fi network even if the router has lost its internet connection. Open the app and try casting. If the Chromecast appears but playback fails, the app or selected content may need an online connection; local device discovery alone cannot supply one.
#1 Best Overall
- The Google TV Streamer (4K) delivers your favorite entertainment quickly, easily, and personalized to you[1,2]
- HDMI 2.1 cable required (sold separately)
- See movies and TV shows from all your services right from your home screen[2]; and find new things to watch with tailored recommendations for everyone in your home based on their interests and viewing habits
- Watch live TV and access over 800 free channels from Pluto TV, Tubi, and more[3]; if you find an interesting show or movie on your TV, mobile app, or Google search, you can easily add it to your watchlist, so it’s ready when you are[2]
- Up to 4K HDR with Dolby Vision delivers captivating, true-to-life detail[4]; and you can connect speakers that support Dolby Atmos for more immersive 3D sound
Google lists at least 20 Mbps high-speed internet and a 4K-capable display as requirements for 4K content. That figure applies to Google’s stated 4K requirements; it is not a universal minimum for local device discovery or a guarantee of offline playback. Google’s device requirements also note that features and performance can depend on the app, device, network, availability, and subscription.
If Wi-Fi is gone, use another shared network
Ordinary casting needs the phone and Chromecast to share a Wi-Fi network. A phone hotspot can create a possible replacement network: connect the Chromecast and the casting device to it, then try casting. This is conditional rather than a guaranteed fix—Google’s reviewed guidance does not validate every hotspot, phone, Chromecast generation, or one-phone arrangement. Check your app’s requirements and mobile carrier plan; streaming over a hotspot can use mobile data.
Rank #2
- The Google TV Streamer (4K) delivers your favorite entertainment quickly, easily, and personalized to you[1,2]
- HDMI 2.1 cable required (sold separately)
- See movies and TV shows from all your services right from your home screen[2]; and find new things to watch with tailored recommendations for everyone in your home based on their interests and viewing habits
- Watch live TV and access over 800 free channels from Pluto TV, Tubi, and more[3]; if you find an interesting show or movie on your TV, mobile app, or Google search, you can easily add it to your watchlist, so it’s ready when you are[2]
- Up to 4K HDR with Dolby Vision delivers captivating, true-to-life detail[4]; and you can connect speakers that support Dolby Atmos for more immersive 3D sound
Google says its streaming devices remember one Wi-Fi network at a time. After changing networks, you may need to forget the old one and connect the Chromecast to the new network. The steps depend on the device.
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- On the TV, open the device’s Wi-Fi settings.
- Forget or disconnect from the old network, then select and set up the new Wi-Fi network.
- Connect the phone you will cast from to that same network and try casting again.
Chromecast (3rd generation or older), Chromecast Ultra, or Chromecast Audio
- Open the Google Home app and select the device.
- Open Settings, then Device information, then Wi-Fi.
- Choose the option to forget the network, then set up the Chromecast on the new shared Wi-Fi network.
These network-change paths are described in Google’s instructions for changing the Wi-Fi network of streaming devices.
Rank #3
- Ask to control your TV with your voice, and quickly cast your photos, videos, music and more from your phone, tablet, or PC to your TV with Chromecast built in
- Built-in Virtual Assistant – just press the mic button on the remote to get what you want
- Built-in content and entertainment including YouTube, Play Movies & TV, and more
- Support for thousands of Apps on the Play Store
- 2K resolution TV streaming
If Chromecast does not appear as a Cast target
- Check that the phone and Chromecast are connected to the same Wi-Fi network, rather than separate guest or isolated networks.
- Check the router or extender for AP isolation or client isolation. These settings can block devices on the same Wi-Fi from communicating. Google’s Cast setup troubleshooting explains the issue.
- Google’s Chromecast and Google Nest/Home setup troubleshooting also identifies UPnP and multicast as relevant to discovering devices on the same Wi-Fi. Public, hotel, or guest networks may restrict that communication.
- On Google TV, check that the Google Cast system app is enabled, then restart the device if casting remains unavailable. See Google TV’s Cast troubleshooting guidance.
Guest mode is not a current workaround: Google says Chromecast Guest mode is no longer supported. A visitor should join the host’s Wi-Fi network to cast. Google’s guest-mode page gives the current status.
Quick Recap
Best Value
- Expand your home entertainment without buying a new TV; Google Chromecast lets you stream your favorites from your phone, tablet, or laptop; no remote needed
- Chromecast is easy to set up up; just plug it in, connect to Wi-Fi, and start streaming to turn your TV into a smart TV; it works with almost any TV that has an HDMI port
- Works with the apps you already know and love; enjoy shows, movies, music, games, sports, photos, live TV, and more from over 2,000 streaming apps in up to 1080p
- With Chromecast, you can stream, pause, play, or adjust the volume right from your phone with just a tap; while you’re streaming, you can still use your phone as you normally do
- Mirror your laptop screen or turn your tablet into an even better entertainment system; surf the web or see your media on the big screen
Rank #4
- HD streaming made simple: With America’s number 1 TV streaming platform,* exploring popular apps—plus tons of free movies, shows, and live TV—is as easy as it is fun. *Based on hours streamed—Hypothesis Group
- Compact without compromises: The sleek design of Roku Streaming Stick won’t block neighboring HDMI ports, and it even powers from your TV alone, plugging into the back and staying out of sight. No wall outlet, no extra cords, no clutter.
- No more juggling remotes: Power up your TV, adjust the volume, and control your Roku device with one remote. Use your voice to quickly search, play entertainment, and more.
- Shows on the go: Take your TV to-go when traveling—without needing to log into someone else’s device.
- TV, simplified: With setup that only takes minutes, a simple-to-navigate Home Screen, and an uncluttered remote control that does all you need—Roku makes it easier to watch the TV you love.
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