70mai App is a mobile phone software used with 70mai Smart Dash Cam. After connected to 70mai Smart Dash Cam by Wi-Fi, you can get realtime image preview from your dash cam. You can also watch historical footage and even download important pictures/video to your cell phone. This process is super simple and does not use your SIM card. In addition, you can check firmware update and download update package by 70mai App. Then, you can push the update package to the dash cam and start updating the device.