Is there any way to check to see if your phone has been jailed? Jailblocked? Jailbaited? Sorry, I don’t know the word, I only just heard of it hours ago. Most anything regarding digital technology is still new to me. Thank you very much!
I assume that there are some clandestine jailbreaking/hacking methods used by nefarious people that we don't even know about and that are difficult to spot. So…based on my assumption…it might be next to impossible for a regular user to know "for certain".
If it worries you then you should restore your iPhone software as new, NOT restore from a backup, and then manually get your settings and apps back.