device for blocking calls?

[PumpkinAle]

6. Don't know if this will help you...........

From RadioShack

Many modern cellphones allow you to block calls from specified numbers rather easily. However, with some other phones, you may have to install an application or use a third-party service to stop unwanted phone calls from interrupting your activities.
Phones with Native Phonebook Blocking Features
Step 1
Press or tap the "Menu" key or button.
Step 2
Select "Settings" and then "Phone" or "Phone Settings"; then tap "Calls" or "Incoming Calls."
Step 3
Press or tap "Blocked Callers," "Blacklist," "Unwanted Calls" or other similarly named menu option. After selecting the appropriate menu option, your contact list or phonebook appears on the screen.
Step 4
Select the name of the person from whom you do not want to receive calls and press or tap "OK" or "Block." If the name of the person is not in your contact list or phone book, enter his phone number in the number field and select "Block" or "OK."
Step 5
Exit the menu screen on the phone. After you block the person, calls from the number no longer appear on your screen nor cause your cellphone to ring. A caller on your blacklist hears a busy signal when he attempts to call or hears a message stating that you do not accept calls from his number.
Android 4.0/4.1 Phones
Step 1
Tap "Contacts" on the Home screen and then scroll down to the name of the person from whom you want to block calls.
Step 2
Tap the "Menu" button and then "Options." Tap the check box next to "Incoming Calls - Send calls directly to voicemail" to place a check mark in it.
Step 3
Return to your contact list and enable the "Incoming Calls - Send calls directly to voicemail" for other contacts as needed. Contacts for whom you enable the option hear your voicemail message when they try to call you and your phone does not ring.

http://techchannel.radioshack.com/block-unwanted-calls-cell-phone-1727.html