Look at the screen in good light with the unlock number pad on it. In most cases youll see at least which numbers were used based on the fingerprints.
If its not clear, you can always wipe the screen, then circle back later and check again.
You won't have the order, but youll know what numbers it contains.
Next, stay close and witness it being unlocked. It may take a couple times of watching but youll start to see the pattern. Especially since you already know the numbers used.
Starts with top left, ends with bottom right, etc. Youll piece it together.
Once you have what you know to be the correct code, wait for a time where youll have extended access.
You can remove the faceID as long as you have the pass code. Google remove FaceID and youll find it.
It then will only require the passcode for apps that previously required FaceID.
Make sure you have your phone camera ready to document evidence. Take pictures of everything that you feel matters in this scenerio. Youll most likely only get one shot at this, so make sure you get what your after.
They will notice their FaceID has been turned off when they access the app again. But all kinds of weird things happen with updates and whatnot.
I agree with everyone else here, once it crosses into infidelity, it can't be undone. I would do everything you can to get ahead of this. Thats way worse than her finding out you were in her phone.
Once you have solid evidence, I would confront her about it. You dont have to lead with that, i wouldnt. but based on what you find it will help tailor questions to see if she lies about that situation. Watch her facial expressions, watch how long it takes to answer each question, Does she deny things you already know are true? All of those things speak volumes.
If all else fails, you'll have the evidence to fall back on.
I will caution you however, once you see things you can't unsee them. They will affect you alot more than you think. Only look at what you need to and get out. The more you absorb, the more your brain will attack you with the images, messages and details. That comes from experiencing this myself.
Good luck to you!
[This message edited by TheBetrayedHusband at 12:22 AM, Saturday, December 20th]