Now that the Jailbreak iOS 10.2 has been released, we recommend you save the SHSH certificate before Apple stops signing it and with more ranzón if you have the new iPhone 7/7 + so you can jailbreak.
Since the jailbreak does not work on iOS 10.2.1 or iOS 10.3, users who plan to jailbreak now or in the future should save their SHSH certificates, as it will allow them to downgrade to iOS 10.2 in the future.
SHSH Guide for iOS 10.2
Save SHSH iOS 10.2 Tsschecker (Mac / Winwdows):1.Download and unzip the latest version of tsschecker from here
2. Connect the iPhone and Open iTunes, and copy the ECID (click on the serial number)
3. Download CPU identifier on your iPhone from the App Store and note Device Model - in this case an iPhone 7 Plus D11AP.
4. Open Terminal (mac) or Command Line (Win) and go to the folder where you unzipped tsschecker-latest :Cd / Users / miMac / Desktop / tsschecker-latest
5. MAC ONLY: When you are there change the permissions with this command:
Chmod + x tsschecker_macos6. Run the following command to save your SSH2 blobs
./tsschecker_macos -B BOARDCONFIG -e ECID -i IOSVERSION -s7. Within the same folder you will create a file with extension .shsh2 save it under 7 keys until the jailbreak of iOS 10.2
in this case:
./tsschecker_macos -B D111AP -e 1D19AAAAAAAAAA -i 10.2 -s