A friend of mine was completely baffled after his wife unlocked his phone when he never gave her the code in the first place.
He changed it and to his disbelief she eventually cracked it again! This left him even more confused not to mention insecure. I explained a few points to give him some perspective and clarity.
It's nothing mystical, it's not sorcery, she's not psychic, an elite computer hacker or can go into The Matrix. He simply handed it over to her unknowingly.
Most women will survey, monitor and mentally document their man's habits, mannerisms and patterns. They will try to passively, sometimes aggressively control every aspect of their man's life.
If you're not in one of those type of relationship where your phones are freely open to each other, it's bound to cause curiosity that can lead to anxiety that feeds uncertainty and breeds insecurity.
In other words, they feel the need to be in on everything in order to be in control and content. They're usually not happy with having little to no access to their mates phones or any other social communicating devices in question.
Think about it, what if you're sleepy or tired from a long, stressful day. Or maybe you were under the influence of some quality party favors and/or liquor. That's an open possibility where you could've dropped your guard and unlock your phone on the spot out in the open. The combination of scenarios and possibilities are numerous.
Should you have to unlock your phone openly, you better change it immediately and email the code to yourself to keep from forgetting it because that can happen when you have to abruptly change your code. I personally prefer elaborate line-less swipe patterns. Once you master the strokes and can swipe it swiftly, it makes that much more difficult to mimic.
Until she gets that code or get caught trying she will not rest. I'm also a firm believer that she may even have had it way before she ever lead on to you. So random changes are recommended. Keeping the same indefinitely does nothing but increase your chances of being breached.
They will try to study your behavior and patterns to take advantage of any open opportunity your guard is down. It only takes a glance and a couple of seconds to memorize your code or swipe. It doesn't matter how fast you try to swipe or punch it or the blind sided angle you thought you were in, you're always liable to be breached.
Unless you share an account, I doubt it's possible for someone other than yourself to gain access to your phone information on a service provider's level. Although I have heard of a couple urban myths with women having friends working at cell phone companies giving their partners. Although very possible, I've never personally experienced nor witnessed that, so I can't say.
I do remember prior to having cellphones, a woman I was dating did crack my answering machine and called back the women (whom were just friends) to confront them. She claimed she was able to do it by memorizing the tones of the key whenever she heard me do it.
This confirms my point on how crafty some of these women can get when it comes to getting in your business and the only ways to counter this is to always stay alert and conscious! Whether by being diligent in your stealth or installing additional security That's what I do because hey, you just never know.
Use a combination of your phone's features along with a security app for back up. If you feel that's still not enough, you can install a motion sensing alarm app that goes off in case your phone is moved.