Apple released iOS 6.1.2 with fixes for Exchange calendar issue which significantly increases network usage, that affects device performance and battery life and the passcode bug.
And more interestingly, we get news that 6.1.2 is jailbreak friendly. So why wait? Evasion 4 has been released for jailbreaking your iOS. With no more delay we head to the steps. But as usual be prepared for the jailbreak like taking the backup of your data, save your SHSH blogs and so on!
Step 1 : Download evasi0n 1.4 and save it on your desktop. (You can find the link below).
Step 2 : Connect your device to the system and ensure that evasi0n detects your device. (Evasi0n will work with iOS 6 firmware from iOS 6.0 to iOS 6.1.2).
Step 3 : Click the jailbreak button (Your device may reboot several times throughout the entire process).
Step 4 : Evasi0n will ask you to unlock your device, here, tap the Jailbreak icon only once on your Home screen.
Step 5 : After evasi0n has completed its process, you can see the exit button. Click the button and wait as the device might need to finish up a few additional steps.
Step 6 : The jailbreak will finish, and you can unlock your iOS device. Now, open the Cydia app on your Home screen( this, may take about 1 to 2 minutes).
Step 7 : After the initialization is complete, the device will respring again. Now that your device is jailbroken, you can start enjoying all the benefits! As this is an untethered jailbreak, you can feel free to reboot your device whenever you wish!
Reference Links-
evasi0n 1.4 for Mac
evasi0n 1.4 for Windows
Must Have Cydia sources (Repos) for your iOS
evasi0n 1.4 for Linux
