So, first of all, there are probably many different guides out there regarding how to remove your own bans.
Now, I have found a way, that is in my opinion the most effective way to get rid of a ban AND it always works. No matter what ban you get, this will remove it, unless you are IP (then just switch to Mobile Networkd if it happened at home, or the other way around). Some people mean this is too much, and not needed and what not, but I mean that, if you want to get unbanned, then why not? It takes 2 minute of your time, and you're done.
Now, this method will remove all saved passwords/information on your phone. Meaning you will have to type in your iCloud credentials, Facebook, WiFi Password & whatever else you have.
This method can also remove your Game Data of some games. For example Clash of Clans and so on. I am sorry that I don't have a list of the games this affects, but you can probably look it up in no time if you need to.
Open Cydia -> Source -> Edit -> Add -> http://repo.biteyourapple.net
Open Cydia -> Search -> iFile -> Install
Open iFile and locate; /Var/Keychains
Once in Keychains remove; (Keychain-2.db) - (Keychain-2.db-shm) - (Keychain-2.db-wal)
Respring, and you're unbanned.