Here share the method to solve  OBDSTAR X300 DP PLUS  register failure problem by resetting the device.  Customer problem:  When I turned on my x300 dp plus, and tapped teamviewer to register, the  registration interface appeared, but quickly jumped back to the user  login interface. I tried it many times, it always showed the same  problem.  x300dp plus log in  Obd2tool.com  engineer replied:  Please try to reset the X300 DP PLUS to solve this problem.    Check the step-by-step guide below.  Step 1: Contact our customer service to get the boot package  Step 2: Copy the Android software with a formatted TF card   Note: Don’t put them in one file  Step 3: Turn on X300 DP Plus, insert the TF card into the slot of the DP Plus  Then long press “Power” button to turn until “update successful” appears.   Step 4: Turn off DP Plus, take out TF card  Then turn it on again  It will take 2-3 minutes during the process  Please kindly notice:  The software is the original software o...