Why doesn't wifi on canon 70D connect to my Android device?

The process of connecting your (in this case Android) phone to your 70D involves multiple steps. First you have to enable wifi (you do this in the menu) on the 70D (the same applies to the 6D) and this brings up the wifi function menu option. When you select the wifi function you will be prompted to register a nickname for the camera. After doing that you'll get some options like transfer images between cameras and connect to EOS utility. You want to connect to a smartphone and then you have to choose between camera access point mode and infrastructure mode. If you're shooting with an access point nearby you can connect both your phone and camera to it. If you're out in the open you can create an access point using your camera and connect your phone to it.

When you've done all this you can finally start your app and begin to remote shoot/view images.

If you want to use your Canon 70D with a wifi connection, enable your camera's wifi. When you get to the choice of camera access point and infrastructure mode, choose infrastructure mode. The 70D's network list will then pop up with all of the wifi hotspots near you. Click on your wifi connection and then type in the password. Once that is done, you should be set for your camera.

Now go to your phone, make sure that you are connected to the same wifi, of course, and then launch the EOS remote app, and click on the bottom button that says camera connection and it should detect your camera. Click that and have fun!

You have to set it up on the camera first. Go to the WiFi menu on your camera, assign the WiFi network a name, and add encryption number. Once the camera is set up, it will broadcast its WiFi. Then, open the App. It will find the camera, ask if you'd like to add that camera, then voila! WiFi control. It works quite well too with the new app. I used it as a remote control.

I have been trying to get it to work since November when the pixel phone first came out. The technical support team at Canon is very nice and helpful but do not know the answer. Turn off Bluetooth on the phone if you have Wi-Fi on. Having Wi-Fi and Bluetooth on will not allow the pixel phone to see the app. Then you can load the Canon Connect app and it should work properly

While writing this post i connected canon camera connect app with my Smartphone. Key is to First Enable the WIFI and then open a WIFI function.

Authenticate Manually.

Even after 2 Yrs after this Post, Users are still facing issues with Automatic authentication.

I know this answer is some years late, but I was so tired of fighting to connect mine that I bought one of these They come in a USB-C version as well. Just plug into your mobile device and plug your camera's cable in and you're all set. Now everything works beautifully without fear of random disconnection. It also works great with the DSLR Controller app (which would not connect over Wi-Fi at all). I hope this helps someone!