iPhone jailbreak

iPhone Jailbreaking is the modification of iOS (iPhone operation system) to access the system files of iPhone. You must want to file system access to remove all Apple restrictions of iPhones. Apple doesn't allow to use many basic to advance functions with users iPhones.  User must Jailbreak their iPhones to get all features with their iPhones

Jailbreaking tools download

Yalu full Jailbreak is the latest tool at the moment for iPhone jailbreak and supports iOS 10.2 to iOS 10 versions. 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. Otherwise, tap below button to get most compatible jailbreak tool.

Basic restricted functions

Users cannot install themes or any customization apps.
Apple doesn't 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 cannot install system apps/tweaks to iPhones.
Users cannot get iPhones apps anywhere other than App store. It means users can only install the Apple approved applications

User cannot Bluetooth files

Advanced restricted functions
Apple doesn't approve Screen recorder apps on App Store
Apple doesn't provide application extensions
No game coins/diamond hacking apps are available for non-Jailbroken iPhones.
The user cannot use any advance system-related apps such as Spy apps, Call recorder apps.
Jailbreaking is the only solution get all above features to the iPhones.
All users must Jailbreak their iPhones to remove all Apple's iOS restrictions and get more impressive functions to their iPhone. Usually, Apple doesn't allow to regular users some most important features as follows

Get New iPhones features to old iPhone

Following features are only available for new iPhones. Users can get these features to their old iPhones using Jailbreak
List
Call history delete - Recent/Call log delete
Contact block -  iBlack list
Wi-Fi only apps using 3G - My3G
Emoji icons - Emoji83+
Jailbroken iPhone users can install following new features without updating firmware version.
iOS 10
Bedtime - Sleep Cycle
Dark Mode Clock app - Eclipse
Raise To Wake -  FaceOff
Lock Screen Widgets - DopeLock
Control Center Redesign - Floater
Colorization of CC toggles - Cream
3D touch on quick launch apps - QuickCenter
Drawing in Messages - Grafiti
Removing stock apps - HideMeX, Springtomize
Clear all notifications - 3D Touch To Clear all Notifications
Notifications redesign - WatchNotifications
Parked Car - Track Back
Rounded UI - Roundification
iOS 9
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

Cydia Installation for iPhones

Cydia is the most popular Jailbreak application manager for iPhones. You cannot download the Cydia from Apple's official app store or website.  Jailbreak is the only way to install Cydia.
Cydia install process varies 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.
iPhone Jailbreak Legal status
iPhone Jailbreak is 100% legal and safe process.  Almost All countries have accepted the legality of Apple iPhone Jailbreaking. In USA  Digital Millennium Copyright Act (DMCA) has declared the legality of iPhone Jailbreaking. Still, Many countries haven't 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 didn't take any action to this)
Bypass iCloud of stolen iPhones using Jailbreak
Changing or harming to Apple trademark is also illegal.

iPhone

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.

Online Jailbreaking methods

Regularly iPhone jailbreak tools require Windows or Mac computer support to complete jailbreak. But Still, you can Jailbreak iPhones using online methods (without using Windows PC or Mac)
* PC support jailbreaking (Jailbreak using Windows, Mac or Linux)
* Browser based jailbreaking (Online jailbreaking)
* Jailbreak using App store (currently disabled by Apple)
Luca Todesco released Windows-based untethered jailbreak tool for iOS 10.2 to iOS 10. But same time iPhone users had the ability to jailbreak iOS 10.2  without PC support. But at this time this method Apple blocked permanently.
JailbreakMe was the most popular 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 "Star" iOS 3.1.2 - iOS 4.0.1
jailbreakMe compatible devices
iPhone 3GS /  iPhone 4 (GSM) / iPhone 4 (CDMA)
zJailbreak is the most recent Online jailbreak method. Currently, this tool supports iOS 10.3.1 to iOS 10.2 versions. zJailbreak is partial jailbreak method.
At this time, Jailbreak teams taking a long time to release proper jailbreak solution to current firmware. Still, no jailbreak solution for latest iOS versions includes iOS 10.3.2 - iOS 10.3.1.
Difference between Jailbroken and non-Jailbroken iPhones
* Jailbroken iPhone users can use both Official App store apps and Cydia apps. Non-jailbroken users only can use Apple app store apps.
* 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.