Please do not worry, you can refer to the methods below to connect your phone to PC
1. After connection, slide downward from the top of the screen to bring up the Notification panel. Select Files in USB connected, then check again.
2. Enable USB debugging. The USB debugging switch can be found in Settings>More settings>Developer options(You can enter *#*#7777#*#* on the dial pad to access Developer options.

1. All the phones purchased from MOOC will be given 2 year international warranty on top of manufacture Warranty.
2. Warranty can be registered online with the IMEI number on the phone package upon purchased.

1. When available RAM is insufficient, it is easy to cause the lagging issue. We suggest you close apps running in the background more often and disable Autostart except for the apps frequently used.
2. When the most space of the system or SD card is occupied, the lagging issue is easy to happen. You can follow these steps to release the space of your phone and SD card.
3. Update is usually meant to optimize the system's compatibility and stability for the newly released phone. It can optimize the existing problems or system bugs. We suggest you keep your phone the latest version.
4. Low power mode saves power by reducing the performance of the phone. When lagging or hanging, do not turn on Low power mode.

Please don`t worry, it is not an issue. Our some phones are not equipped with the headset. For details, you can visit our official website.
If you want to purchase the headset, you can visit our MOOC online Store or MOOC Service Center.

Please don`t worry, there is a way that might help you track your Andriod phone:
1. Go to https://www.google.com/android/find and sign in to your Google Account.
2. If you have more than one device, click the lost device at the top of the screen.
3. The device gets a notification.
4. On the map, see about where the device is.
5. The location is approximate and might not be accurate.
6. If your device can't be found, you'll see its last known location, if available.
7. Pick what you want to do. If needed, first click Enable lock & erase.