[Yung Lean]

I wouldn't do that if I were you, if he catches you and you were in the wrong it would cause a big problem in the relationship.

But if you really want too, then there is no need, just check his texts/facebook when he is asleep or something

Pretty sure she would've done that ages ago.
But she hasn't which leads to his phone being locked with PIN Code/ Password or Finger print scan.

[Hazard]

Don't spy on his phone, it makes the relationship a lot more tense.

[Greece]

He is using iPhone 6. For some reason, I suspect that he is flirting with one of his female workmate. Is it legal if I spy on his mobile phone? And how can I do that?

Obviously spying on someone's convo without their permission is illegal. However, if it's sms it's using your reception. Ideas:

1: Simply check his messages on his phone
2: Download WireShark and connect to monitor your local wifi and try to capture packets (only will work if he's using iMessages from the WiFi and even then I think they will be encrypted.

The most simple option you have is to just check the messages on his phone ;p

[Skullmeat]

Doing that violates federal wiretap laws. If you really believe that your significant other is cheating, either it's time to move on, or get counseling.

[Oni]

This isn't really a forum about morals.

[Hazard]

This isn't really a forum about morals.

Would you really wanted this forum to be known as the forum who helped a woman named Carol violate federal law, though?

[Oni]

Would you really wanted this forum to be known as the forum whose users helped a woman named Carol violate federal law, though?

Fixed, and not really.

[Shebang]

Since you are married, I assume you're an adult. As such, try acting like one and talk to him about it. Communication is key.

[Oni]

I figure this might be easier to do (if he uses TouchID):

[w00t]

If he has an iPhone, get his iCloud password. Photos, calender, iMessages, you'll have them all