1. MY DRONE WILL NOT CONNECT WITH THE CONTROLLER
Controllers are not cross compatible so ensure that are using the controller that came with your drone
Hold down the F-trim, B-trim, and power button for 5 seconds. The controller will beep once and then begin beeping continuously to indicate that it is searching for a drone. Turn the controller and drone off and back on again to see if they pair. Give them about 30 seconds. Make sure the drone is on a level surface (and NOT moving).
If that still doesn't work, make sure the drone's battery is fully charged and that you have fresh AAA batteries in the controller.
2. I CAN'T CONNECT TO THE WIFI (FORGOT PASSWORD)
Try resetting your drone's WiFi password. To do this, first turn on the controller and drone. Then hold down the "L" trim, "R" trim, and power button down simultaneously for 5 seconds (or until the controller beeps). The Wifi password is now erased, and you should be able to connect to the WiFi and set a new password in the app.
3. MY DRONE IS ASKING FOR A PASSWORD
You can make up any 8 character password
4. IS MY PHONE COMPATIBLE WITH THE APP
Here's a list of compatible devices: https://support.skyrocketon.com/hc/en-us/articles/115012253528-Sky-Viper-Supported-Mobile-Phones
5. The firmware update doesn't work
Make sure to forget all WiFi networks nearby (so it does not try to reconnect automatically)
Connect to the drone's WiFi - Stay until you see the confirmation message that it has connected
Make sure the App is closed al the way (and not minimized in the background)
Launch the App (fresh start)
Try to OTA (over the air) update