please recommendation for accessible dialer

a few months ago i decided to switch from iphone to android and i bought huawei t8. the problem is with the default dialer of the device. when i am in the middle of a call and i press the "show dialer" button it displays it but never tells me the numbers i touch. this problem occures only when i am in an active call. when i tried to install other dialers and make a call with them it still displayed the default dialer after the call was made.