modular747 wrote:
Only your carrier can do that. Contact them. Most wireless carriers don't provide this service.
Uhm, actually if your carrier is in the US your carrier is forbidden from genreically blocking no id calls. they can only block specifc numbers you request, whcih is a catch 22 sicne you don;t know the nubmer.
It can easily be done on Andriod and WM phones through a variety of apps. Only Apple nixes apps that would reject or even silence these calls, you have to jailbrake the phone to get an effective app on iiphone
For some reason Apple with ios 7 also stopped parsing "blocked", where the caller is purposly blocking you fro seeing their ID, v the "no caller ID, which is more often an international call that is not successuflly showing Id, so now you can't even tell when callers who are activly blocking display are the ones calling.
I have been getting an increasing numbe rof these calls despite being on the do not call list. A lot of thse spammers can contract with any company you have a relationship with to get your number and effectivley skirt do not call regulations.
If this is an issue your solution is to go android