You may have noticed you've been getting a lot of junk phone calls on your cell phone lately and WSB consumer expert, Clark Howard says it's only going to get worse. "Over the next year, well over half of all phone calls coming into cell phones will be junk calls," says Howard.

The Federal Do Not Call list does little to stop them, as most of the calls are coming from outside the United States.

Many of the callers are now spoofing. Spoofing is when con artists and robocallers use technology to modify what phone numbers appear on caller ID, impersonating phone numbers from neighbors, friends and local businesses to try to get you to answer the call. In many instances, it is a random number with the same area code and first three digits as your own phone number. In other cases, the number displays as coming from a local business or person in which you’ve previously communicated.

"The newest technique is they call you in rapid fire succession, three times in a row and you may feel a sense of urgency and answer," says Howard. He says the best advice; if you don't know the number that's calling you, then do not answer the phone!