I've more than enough experience of how explosive a relationship can be, as I've been in it for over six years.
Jealousy and paranoid thoughts can have severe effects on you and your partner, especially if you believe that their is a relationship going on. Its down to you to figure out if he or she is cheating and having proof is the best way of facing your partner to try and resolve any issues.
Do you trust each other, are you in the sort of relationship where you can go for a night out alone with your friends and there is no arguments about what you've done, where you have been and you come home. These questions shouldn't be a problem if there's trust in a relationship then.
If you would like to assess the messages and numbers in your partners cell afterward this also should be allowed as if you trust each other and are loyal, there would be nothing to hide. This would suggest that there maybe something to hide if there is an argument about this and the deficiency of trust then.
If when looking through your partners cell, you encounter a phone number that shows up often and there's no caller id then this could be the lovers number. Some cheaters will have the number in the phone with no name to attempt and go undetected if a partner tests.
What you can do is run a reverse phone lookup on the number and the service will give you the name and address of any phone or cell telephone number. This would let you decide on what action to take or whether to face your spouse or not. If the results demonstrate that the amount if from the opposite sex then that will imply that additional investigation is needed.
Having the number and address of this man will enable you to face the number owner to try and confirm the reason behind the frequent phone calls. Maybe it's going to lead to nothing or perhaps you will get evidence and the info you will need.
Inverse phone detective has a frequently updated database and first class customer services and is the main choice for reverse phone lookup. If your amount returns no results then you definitely can opt for a refund with no questions asked.