This is a lousy app which has been pre-installed to replace the original and perfect MIUI dialler's app on Xiaomi's global version phones. It contains many shortcomings including wrong, unwanted and unknown information appeared, and unintuitive interface which isn't strong and informative enough to be part of a phone's dialler's app. I've been submitting feedbacks almost on a daily basis but I have yet to see any improvement or rectification done in the app as of to-date. Please learn from MIUI!