iOS 8.3 Jailbreak step by step guide here:
Step 1 – Please confirm that your device software version is iOS 8.3. This guides and online tools have specially developed for iOS 8.3 jailbreak. You can check your iOS software version from this path
Tap the settings icon, then go to the general and and about, Then check the iOS version,
it should be the iOS 8.3
Step 2 – Then open the Safari browser on your iOS device
You must use the safari browser for this process,
You cannot use the Google chrome or any other browser to
do the semi JB
Step 3 – Then search this webpage using Google,
You can search this page using following terms or type the
following web address on your address bar of the Safari browser
“Jailbreak iOS 8.3”
“iOS 8.3 jailbreak”
Then scroll down to find the link of this webpage.
Tap the “Jailbreak iOS 8.3 – Pangu8” link here:http://pangu8.com/122.html
Step 4 – Go to this page and tap the “start Jailbreak” button. Then it takes some time to complete the process. Don’t close the Safari browser or don’t open any other app among this process
Step 5 – After the JB process it must take you to your settings to install the SemiJB application.
Otherwise please redo the process again.
Step 6 – After the installation of SemiJB app you can install the default Semi JB app manager and web based Cydia application just one click.