This happened to my friend Mark from Los Angeles recently.
iTunes backup can be password-protected and if you want to do a full restore, you will be asked for a password to unlock the backup first. Certainly, iTunes backup is useful to data security on iPhone. However, things can be troublesome when you keep an iPhone 6s at hand but lost password to iPhone 6s backup.
When your iTunes backup password goes missing, don't be panic. The first thing to do is to try as much as possible passwords. If you still can't unlock backup password on iPhone 6s, you still have a chance to fix the problem. That is to use an iTunes backup password recovery tool mentioned below to recover lost iPhone 6s backup password and regain access to iTunes backup.
PassFab iPhone Backup Unlocker is designed to quickly recover iTunes backup file password for iOS devices then enable you to access your data successfully. This software will also turn off iPhone backup password to get rid of the annoying password prompting. It supports all iTunes backup (even the latest iTunes 12.2) of iPhone, iPad and iPod including red iPhone 7/SE/6s/6s Plus/6/6Plus/5s/5c/5/4S/4, iPad Air 2, iPad mini 4/3, iPad 4, iPod touch, etc.
How to Recover iPhone 6s Backup Password from iTunes Backup with iPhone Backup Unlocker
Firstly, download, install PassFab iPhone Backup Unlocker.
Step 1: Launch the tool and click "Add" in the main interface of it to import iTunes backup files on the computer. Find the encrypted backup that you wanted and double-click on it.
Step 2: PassFab iPhone Backup Unlocker provides 3 types of attacks, namely Brute-force Attack, Brute-force with Mask Attack and Dictionary Attack. Select the most appropriate one to effectively retrieve iTunes backup file password on iPhone 6s.
Step 3: Click on "Start". Within a while, your iTunes backup password will display.
With this tool, you are also provided to remove your iTunes backup password which iTunes can't do. Click here for more detailed guide.
Don't be irritated by how to restore lost/forgot password for iPhone 6s backup any more. After finish reading, you will get access to your iPhone 6s files again! Now give PassFab iPhone Backup Unlocker a free trail and download it!