Will Reset all Settings remove jailbreak?

If not, how do I remove jailbreak? Yesterday, iGot a new iPhone 4, because my other one fell down cement stairs, and iJailbroke it. Then my sister wanted me to do it on her 4s, so iDid. Then she didn't like it, and asked me to remove it. If reset all settings won't erase it, what will?

Added (1). She doesn't like jailbreak because:
1.It kills battery hella fast.
2.It voids warranty.
3. If it gets messed up, Apple won't replace i, and
4. She doesn't know what she's missing out on.

I believe if you simply hook it up to your computer and sync it to iTunes

Why doesn't she like it? And how does it bother her? It's just an icon on the screen. If she doesn't like it she can go on iTunes and restore it from Apple. Then set up as new device and use iCloud to get her stuff back… Why doesn't she like the jailbreak? Not smart enough to know how to use it?

No, it won't remove the jailbreak. It doesn't delete any data, just resets the settings. If you want to remove the jailbreak, you have to restore the iOS on the iPhone.

  • Will the MAC address of my iPhone reset if I reset my iPhone to its factory settings over iTunes? I have jailbroken my device and used terminal to change my MAC address so that I could connect to school's Wi-Fi. But when I wanted to change it to its initial number, I typed in a wrong value and it just messed up my Wi-Fi, I can't connect to Wi-Fi anymore. Wonder if resetting to factory settings would help…
  • What settings will it change if I press reset all settings on my iPhone? Also, will this help speed up my iPhone because that's what I've heard. Because my iPhone has been so slow lately and taking like 3-5 minutes to send 1 text. If you know of any other ways that could help speed that up please also let me know that.
  • What if i reset all settings? I have to reset all my settings on my iPhone so what will happened? I mean, will all my music and photos delete?
  • Reset all settings on iPhone 6? I've been having recent battery issues on my iPhone 6. It just tends to die quicker than it used too. I was talking to an Apple person and they mentioned Resetting all settings. Is this a good idea for the problem I'm having? She said it won't affect any of my data or pictures or anything like that. I know that my Wi-Fi settings will change and ringtones and stuff like that. Is there anything else that will change?