iPhone jailbreak

iPhone jailbreak is the process of removing the software restrictions defined by Apple. After jailbreaking, users can customize the iPhone using 3rd party apps which Apple does not allow to install. As well users can add features to their iPhone using jailbreak tweaks.
iPhone jailbreak may vary according to device model and iOS version. Therefore, you should know iPhone device model and iOS version before start iPhone jailbreak. Go to Settings -- > General -- > About to know running iOS version.
There are two jailbreak methods available for the iPhone.These are Online jailbreak without PC support (Browser based jailbreak ) and PC support jailbreak (Jailbreak using Windows, Mac or Linux).

Online jailbreak without PC support (Browser based jailbreak )

Online jailbreak methods are available as iOS system rooted jailbreak and non-rooted jailbreak. System rooted jailbreak will offer the full functional Cydia and non-rooted Jailbreak install partial functional Cydia.
iOS system rooted Jailbreak method is the standard & stable method & it will offer fully functional Cydia. This is commonly used and demanded method in the jailbreak community.
Non system rooted Online jailbreak method is a iOS hacking method, and it does not access iOS system files. Users can install some of Cydia apps using this method. But this is not full functional Cydia.

zJailbreak :

zJailbreak is alternative jailbreak solution for all 32-bit and 64-bit devices running all iOS 10 versions including iOS 10.2.1,iOS 10.3, iOS 10.3.1, iOS 10.3.2 and iOS 10.3.3 Also zjailbreak compatible with latest iOS 11 jailbreak All the methods are mentioned below.
Pangu Anzhuang
Yalu102 online Jailbreak
Yalu 102 tool which was released by luca Todesco, supported to jailbreak 64-bit devices running iOS 10 to iOS 10.2.This online tool was 100% PC free jailbreak method and  iOS system rooted. Go to Yalu jailbreak  page for more details.
Phoenix online Jailbreak
Phoenix jailbreak tool is recently released jailbreak tool for 32-bit devices running iOS 9.3.5. This is iOS system rooted semi-untethered jailbreak method and released by Siguza and tihmstar. It is available PC required method too. Click Phoenix Jailbreak to get full details.
JailbreakMe
JailbreakMe was the popular system rooted  online jailbreak tool. JailbreakMe tool does not support to latest iPhone iOS versions.
JailbreakMe tool has two versions.
* JailbreakMe "Saffron" - iOS 4.2.6 - iOS 4.3.3
JailbreakMe compatible devices:
* iPhone 3GS /  iPhone 4 (GSM) / iPhone 4 (CDMA)

PC support jailbreak (Jailbreak using Windows, Mac or Linux)

PC support jailbreak is the commonly used standard method.This method also available as system rooted and non system rooted jailbreak. Methods are given below.
Velonzy jailbreak
Velonzy is non system rooted jailbreak solution for latest iOS versions & it is available under zJailbreak. This is allowing you to install jailbreak tweaks using Cydia impactor. This is compatible with for iOS 10.3.2 & iOS 10.3.3 and latest iOS 11 versions.
Pangu8 Jailbreak Installer
This PC support Jailbreak app installer available under zJailbreak and this is non system rooted jailbreak app installation method for iOS 10 to iOS 10.3.3 versions. However, this installer is temporarily disabled.
Yalu102 Jailbreak
This system rooted method can be used to jailbreak iOS 10 to iOS 10.2 versions as PC support method.
Phoenix Jailbreak
As the latest jailbreak tool release, users can jailbreak all the 32-bit devices running iOS 9.3.5 version only. It is possible to install full functional Cydia using this method.
Pangu9 jailbreak
Pangu9 tool is compatible to jailbreak all the 64-bit devices running iOS 9.2 to iOS 9.3.3 versions as system rooted jailbreak. Visit iOS 9.3.3 jailbreak page for more details.
PP Helper
PP Helper is the only solution to jailbreak iOS 8 to iOS 8.4 versions. It can install full functional Cydia using this method. Click on the iOS 8.4 jailbreak page to get more details.

Cydia Installation for iPhones

Cydia is the most popular 3rd party app store consisting millions of 3rd party jailbreak tweaks. You cannot download the Cydia from Apple's official app store or website. Jailbreak is the only way to install Cydia.
Cydia install process differ according to iOS version and device model. All popular iPhone Jailbreak tools install the Cydia after the Jailbreak process. Rarely, You have to install the Cydia manually after the Jailbreak. However, You must have Cydia app to manage your Jailbreak apps on your iPhone. Also another way to install jailbreak tweaks using Cydia Impactor.
It has two types of Cydia installation process. One method installs full functional Cydia after complete system rooted jailbreak. Other method offers Cydia lite as partial jailbreak app. It never ask to access iPhone system root to install Cydia lite. You can find Cydia lite app under the zJailbreak app store.

Why should jailbreak iPhone

All users must Jailbreak their iPhones to remove all Apple's iOS restrictions and get more impressive functions to their iPhone. Usually, Apple does not allow regular users to some most important functions as follows. Jailbreaking is the only solution get below mentioned features to the iPhones.
Basic restricted functions:
Users cannot install themes or any customization apps.
Apple does not allow to use new features with their old iOS devices.
ex - Jailbreak users can use 3d touch apps, Siri, New emoji icons, .... with new iPhones
Users can not install system apps/tweaks to iPhones.
Users can not direct download 3rd party apps from any other sources. They can download only Apple app store’s apps only.
User cannot Bluetooth files
Advanced restricted functions :
Apple does not provide application extensions.
No game coins/diamond hacking apps are available.
The user cannot use any advance system-related apps such as Spy apps, Call recorder apps.

iPhone Jailbreak Legal status

iPhone Jailbreak is 100% legal and safe process. Almost all countries have accepted the legality of Apple iPhone Jailbreaking. Digital Millennium Copyright Act (DMCA) has declared the legality of iPhone Jailbreaking in USA. Still, Many countries have not introduced laws about iPhone Jailbreaking.

However, following iPhone Jailbreak, related things are still illegal.
Unlock iPhones SIM using Jailbreak apps or tweaks.
Use Spying apps without informing the person (You can spy your child's or worker's iPhone if you are parent or Employee)
Download Paid apps or paid apps upgrade for free. (Many jailbreak users are download paid apps for free to their iPhones. Anybody did not take any action to this)
Bypass iCloud of stolen iPhones using Jailbreak.
Changing or harming to Apple trademark is also illegal.

iPhone Jailbreaking FAQ

Actually, iPhone Jailbreaking is safe if you are using a trusted Jailbreak software from trusted website. However following problems may happen for jailbroken iPhones.
Apple removes the Warranty.
You can get your warranty back just upgrading or restoring your iPhone. Apple cannot detect previous Jailbreak status after you upgrade/restore your iPhone.
Virus/Malware attack.
Jailbroken users are safe if they install apps/tweaks only from trusted sources. Jailbreak app managers warn to users if they try to install apps from untrusted/hacking sources. Many users ignore these warnings to install hacked apps to their iPhones. Recently Apple had two malware attacks and both malware affected to non-jailbroken and jailbroken iPhone devices. But Pangu jailbreak team released malware removal tool before Apple attend.
OTA updates not receiving.
Jailbroken users are receiving iOS OTA update lately. But jailbroken users can use iTunes method for firmware upgrade.

Difference between Jailbroken and non-Jailbroken iPhones

Jailbroken iPhone users can install following new features without updating firmware version.
Jailbroken iPhone users can install Apple latest features through jailbreak without upgrading firmware. But Non-jailbroken users cannot install Apple latest features without a firmware upgrade.
Non-jailbroken iPhones users only can install Apple approved Applications from the official App store. Jailbroken iPhone users can install any Apple dissentient apps.
Jailbroken iPhone users cannot claim Apple warranty (without restore or upgrade) -. Non-jailbroken iPhone users can request Apple warranty anytime.
Battery drain issue is big minus factor of iPhone devices. But Jailbroken iPhone users can increase battery life more than non-jailbroken users.
Jailbroken iPhone users can use custom ringtones. But Non-jailbroken only can add default ringtone, or Apple approved ringtones via the official app store.

Get new iPhones features to old iPhone via Jailbreak

Jailbroken iPhone users can install following new features without updating firmware version.
 
iOS 10
 
 
iOS 9
Bedtime - Sleep Cycle
Dark Mode Clock app - Eclipse
Raise To Wake -  FaceOff
Control   Center Redesign - Floater
Colorization   of CC toggles - Cream
Drawing   in Messages - Grafiti
Removing  stock apps - HideMeX, Springtomize
Notifications  redesign - WatchNotifications
Parked  Car - Track Back
Rounded  UI - Roundification
 
Night Shift - F.lux
Emoji   icons - Emoji83+
Live   photo - PhotosLive / EnableLivePhotos
Slide Over - Medusa /Splitify
Split   View - Medusa /Splitify
Picture  in picture - Medusa / VideoPane
QuickType   - PredictiveKeyboard
3D Touch   - Tether / Snakebite / 3D Touch Notifications / Forcy /appendix /revealMenu /Tactful
 
iOS 8
FaceTime - MEFaceTimeiOS8
Emoji  icons - Emoji83+
Rename  Message Conversations - MessageRenamer7
Hey, Siri  -  OkSiri
Touch ID and Third-Party Integration - Asphaleia, BioLockdown, BioProtect
Third-Party  Keyboards - SwipeSelection, AltKeyboard 2
QuickType - PredictiveKeyboard
Custom  widgets for Notification Center - iWidget
 
iOS 7
 
Multitasking: Auxo / CardSwitcher
Real-time  Updating Clock - LiveClock
Filters in the Photo App- PhotoFilters
Block Calls/People - iBlacklist
Notification Center in LockScreen - IntelliScreenX
AirDrop -  Instashare
 
iOS 6
Apple App - Google App
Smarter  Siri - Facebook Integration
Photo Stream Over iCloud
Passbook App
 
 
iOS 5
Multitasking - Zephyr
Camera shortcut - AnyLockApp
Message - BiteSMS
 
 
iOS 4
Folders - Stacks
Spell  check - Predictive keyboard
Text  Replace
Virtual   Keyboard
Bluetooth   Keyboard Support
 
 
Also zJailbreak 11 is compatible with iOS 11 jailbreak & higher versions. All the methods are mentioned below.
Pangu Anzhuang is the best way to install Jailbreak tweaks for iOS 10.3 to iOS 11.1 versions as non system rooted jailbreak method. However, Pangu Anzhuang works for iOS 11.1 jailbreak partially for the betas.
Saigon Jailbreak
Saigon is the latest jailbreak releases for all 64-bit devices running iOS 10.2.1. You can install Cydia using this semi-untethered jailbreak. Go to Saigon jailbreak  page for more details.