For some reason my Galaxy S5 mini (SM-G800) is locked and asking for the alternate password instead of my fingerprint. I already restarted it, took of the battery, but it always goes to the same locked screen on boot.

I also tried the Android Device Manager on my google account. I tried the Lock option, changing the password, but since the phone was already locked, it is not working. By the way, the phone WiFi is on.

I searched a lot and found no solution besides resetting my phone and loosing everything. The are a lot of photos and stuff that I don't want to loose! So the reset is still not an option.

It seams so stupid that I own the google account registered on the phone, I own the fingerprint to login and I know everything is inside the phone, but I cant login! Any simple email account have a forget password option! Why the fingerprint login does not come back!?? Stupid programmers!!

Some sites says that after about 20 incorrect passwords tries it would give me an option to logging using my google account, but I already tried a lot of password and the only thing that happens is a wait 30 seconds countdown !

Edit 1: Just found out this site www.unlockscreen.com but I don't know it is some kind of fishing/trojan or the real deal.

Edit 2: It seems my version of Android and/or fingerprint does not have the "forgotten button". It never appears. Also, I don't want to loose the warranty.

  • Do you know your email? Maybe, it's possible to change your password using a computer and your phone might sync to it.
    – Angelo
    Feb 1, 2016 at 15:31
  • If you're afraid of your photo, you can go to photos.google.com
    – Angelo
    Feb 1, 2016 at 15:32
  • @ChristopherAngelo I know my email, but the alternate password is not linked to it, it is internal to the phone fingerprint. My photos are not synced
    – Pedro77
    Feb 1, 2016 at 16:53
  • 1
    Try all the methods in a similar question on here: Izzy's Answer on Unlocking Android Devices via Google, ADB, and Recovery - Android Enthusiasts Feb 2, 2016 at 2:18
  • Thanks @AaronGillion, I did not try everything that is listed there, but most of it does not work. I was thinking, ins't there an app that I can install through google.play site that does a full backup of my data?
    – Pedro77
    Feb 6, 2016 at 21:40

2 Answers 2


I don't know if this works or not, but according to this post:

just unlock it via findmymobile.samsung.com
you either need to already have an account there or just setup one.
you can simply unlock it via this service.

Since it's an official Samsung service instead of a sketchy third-party one, it seems like it's worth a try. I don't think it will work though, unless if you've already set up a Samsung account on your phone and given it remote access.

  • There is the need to setup the account inside the phone first. I've never done that, so my phone is not listed on the findmymobile!
    – Pedro77
    Feb 2, 2016 at 11:19
  • I know this seems kind of dumb to ask, but have you given the fingerprint sensor a thorough cleaning? Some people reported that doing this fixed their problem.
    – tjohnson
    Feb 2, 2016 at 11:34
  • The phone is not trying to use the sensor I guess. It is clean.
    – Pedro77
    Feb 2, 2016 at 20:05

Normally Android has a password forgotten button. Maybe you have to enter a few times a wrong password. Then you can use your email to log in.

Another option is to root your phone. You will lose your guaranty and normally I don't recommend this to people who don't know what this is or what they do.

I think there is a possibility to root your phone without loosing data (but I am not sure) and then it should be possible to reset the password or to make a backup from your data. If rooting is an option for you you can search for it.

  • It seams my version of Android and/or fingerprint does not have this "forgotten button". It never appears. I don't want to loose the warranty.
    – Pedro77
    Feb 2, 2016 at 11:21
  • Is it possible to root a locked phone? Feb 2, 2016 at 14:59
  • 1
    It depends on the phone but Samsung phones can be rooted using Odin and for this you have to be in download mode. So I think it's possible to root a locked phone
    – Martin
    Feb 2, 2016 at 15:50

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