In Xperia Z5 stock call blocker, you can only input one number "manually" at a time.
In case you need to select many numbers through contacts or sms, after back up process for example, it becomes a hassle add/remove numbers.
I suggest adding the facility to select or remove multiple numbers through contact/sms list similar to third party applications.
Downloading third party appa for such simple taks only slows down the phone unnecessarily.
