If you're going to make a post requesting help, please attempt to provide the following information. It may assist those trying to help you in narrowing down the problem. Reminder that this is a "users helping users" forum. It may or may not be patrolled by Hammerhead. For serious issues with the hardware/software, you should put in a customer service request through official channels.
https://support.hammerhead.io/hc/en-us -- "Submit a request" at the top of the page.
Information to provide:
1. Your Karoo's software version. You can find this by going to "Settings > About" and scrolling down. (Updating to the newest software may solve a myriad of problems depending on when you got your device and how many updates there have been since it was put in the box.)
2. Your problem. Be as specific as possible.
3. Is it repeatable? Random?