- Confirm whether the card insertion method is correct (SIM Cardinserted with metal side down, and the notch end is facing inward);

- Do not insert or remove the SIM card when the product is turned on.

The product must be turned off to remove and insert the SIM card.

- When it appears that it needs to be updated, please click the "Cancel" button (Don't update or delete the software preloaded on the product).

- Settings - Network and Internet - APN, manually adjust it;

- Insert the SIM card into the Android phone and check the information parameters of the APN in the phone.  Then in the product settings network and Internet - APN - right upper corner "+" sign, add APN parameters (add according to the parameters in the mobile phone);

- If you need a video tutorial of the operation, please contact the store customer service directly.

-Check whether the DC head of the cigarette lighter power cord is damaged or aging.

-Check whether the fuse of the power plug is disconnected or burned.

-Touch is invalid during power-on, wait for normal power-on before operation.

-Check whether the touch is damaged, do not touch the screen with sharp objects, it is easy to scratch and damage.

- Buy the manufacturer's matching rear-view camera before it can be used.

- Whether the AVIN interface is inserted to the bottom.

- Check if the camera format matches

- The first connection takes a littlelonger.

- Only iPhone supports Carplay.

- Check that the WiFi and Bluetooth functions of the mobile phone are normal.

- Enter Settings-General-Carplay vehicle, delete all records and reconnect.

- Restart the iPhone and reconnect it.

- Only Android phones are supported.

- Update Auto and related applications on mobile phones to the latest version.

- Check that the WiFi and Bluetooth functions of the mobile phone are normal.

- Restart the Android phone and connect it again.

- Only Android phones are supported.

- Update Android system and related applications to the latest version.

- Disconnect any VPN on the mobile phone if applicable.

- Ensure WiFi and Bluetooth functions on mobile phone are working.

- Restart the Android phone and reconnect.

- Restore Factory Setting of the screen. Go to home interface of screen; Setting>Basic Setup>Restore Factory Setting.

If the unit crashes and the screen gets stuck, cut off the power and turn on screen again.