Please help quick question before jail breaking

[non123]

If i jail break my phone with evasi0n7 will all my saved wifi passwords be removed?

 

[willerz2]

Jailbreaking using userland jailbreaks such as Evasi0n will not wipe your device of any data, it simply overlays some of the default iOS aspects during the process. However, on the occasion that something goes wrong (which it has in the not so distant past with Evasi0n7), it's best to backup your device prior to jailbreaking.