Spam call to cell phone

These people were using several different numbers to call multiple times wasting my cell minutes, but I found a way to block them. If you have an Android cell phone you can download a FREE app called Mr. Number. It allows you to block a specific number or all calls from a specific area code.  I have over 30 area codes blocked. Unfortunately, Mr. Number only work on an Android phone.  Try it, it blocks at vleast one call to my cell phone every day.