A developer has taken advantage of telegram bot feature to create a bot that generates SHSH2 blobs right on your iPhone. The bot will ask for your device model, the iOS firmware for which you want to generate the blob and your device’s ECID. After you provide this information, it will instantly generate and send you your SHSH2 blob along with a link where you can download it from your computer if needed.
If you have Telegram installed, you can add the bot by opening the link below from your iPhone. After you add it, send the /shsh command to it and it will start asking you questions to generate the blob.
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As of this writing, you can only save SHSH2 blobs for iOS 10.2 as it is the only firmware that Apple is signing. Although an iOS 10.2 jailbreak is not planned at this moment, you never know when it will come in handy.
Credits to iPhoneHacks.com and me for finding.
An SHSH Blob is basically what Apple uses to verify the version of iOS you are running. That's why we tell you to save your SHSH Blobs before upgrading your firmware on your iDevice. Otherwise you might not be able to downgrade to a previous version in the event you needed to.
Downgrading or updating to specific version will disable Touch ID Feature