You have to go into your phone settings, apps, select k-9 and pick your sounds from there. Works fine on A10 + A12 based devices, so it should work on A11 as well. See here where I explained it a few months ago (with pics) 
You have to go into your phone settings, apps, select k-9 and pick your sounds from there. Works fine on A10 + A12 based devices, so it should work on A11 as well. See here where I explained it a few months ago (with pics)