If allowed, and many do, cell phones invade lives. Even in the middle of sex, a partner will hear his phone ring and consider answering it.

As our personal communication tool, we set up preferences, we track who’s calling through caller ID, we know who called from our call log, we retrieve calls we made, we have conversations through text messaging if we don’t want to be overheard and better yet, we can check our mobile browser without a trace. If we miss a call, voice mail kicks in. We can then choose to listen to the voice mail and call back in privacy.

Little wonder this handy dandy personal tool is the number one device used in cheating relationships.

There isn’t a slicker device that provides instant communication, written and verbal, and can be fully secured via a password or by wearing it on your body 24/7.

Ok. Cards exist to crack into cell phones and voicemails. Besides being illegal, you need to be a little tech savvy and realistically, who uses these extreme measures? So, if you are suspicious about who’s calling, you are left with deciphering his cell phone usage and changes in your husband’s behavior.

You know something’s wrong when the hair at the back of your neck bristles when hearing his cell phone ring. It wouldn’t be such an event, if he wasn’t so secretive with his cell phone. You have this creepy feeling that he could be cheating.

Check out these 12 signs of cheating with a cell phone:

1. He is protective of his cell phone – wears it all the time or keeps it stashed in his briefcase
2. His cell phone is password protected
3. When it rings he glances to see where you are before answering
4. He goes into another room to take the call
5. He talks in a hushed voice or cryptic manner
6. He doesn’t let you near his phone even  if you ask about a phone feature or ask to see how it works (phones have some pretty nifty features)
7. When you ask who called, he usually says work or the same friend and is short on why they called
8. Shortly after the call, he goes to his computer
9. Shortly after the call, he makes on excuse to leave the house – alone
10. His cell phone bill is higher than usual or you notice unrecognizable phone numbers
11. Lately, you do not have a copy of his cell phone bill
12. He has a new cell phone – perhaps even a pay as you go that has no call tracking

As an affair advances, so does the communication. Expect his cell phone to ring more frequently.

If you want to know if your husband is cheating on you, become more observant. Ask questions, observe what he does and notice how he interacts with you. You may not have conclusive proof of cheating based on one of the above signs of cheating, but if you observe a few of them, it’s likely you have reason to be suspicious of infidelity.