mobile

OK, I know this sounds shady, but my phone broke and I had to borrow a friends old phone until I can afford to get it repaired. Down side is, there's a pattern lock in place which he can't remember. It may have been set by his younger sister, who also does not remember it. So OK, put in the passcode wrong 5 times and just log in to the google account, right? Nah, nothing in life is that simple. They can't remember which account was used to link to the phone, or if it was an old account that they won't even know the name of.

Phone is not rooted, not even got USB debugging on so can't root it to bypass, tried resetting in Sony PC Companion to help but in Windows 10 Technical Preview the program needs a hotfix which can't be installed due to it being for the wrong version of Windows, and in a virtual machine of XP the system BSOD's nearly halfway through the process. Honestly struggling and need help here, all of your help is much appreciated <3