Instruction for Xiaomi To run Whoscall successfully, please follow the steps to set your Xiaomi MIUI 6 User Guide Non-MIUI 6 User Guide Step 1 Find the「Settings」in the main page Step 2 Choose 「General Settings > Apps」to find Whoscall Step 3 Turn on 「show popup windows」on app info Step 4 Tap「Manage permission」and turn on 「Trust this app」 and check the following option checked Finished! Restart Whoscall