Need to UNLOCK phone without losing contacts

You can use Google /Samsung account to unlock the phone. If you forget your account detail somehow and don't want to factory reset causing the data loss, you can only use the Broken Android Data Extraction to unlock your phone.

Here comes more detail.
TIL How to Unlock Android Phone Password without Factory Reset

How to Unlock Samsung Phone without Password

Broken Android Data Extraction Fix Error Recover Data from Broken Android

Yes, you can unlock it. By the way, unlocking the FRP or bypassing a google account is getting hard day by day but it is still possible. Going through some steps will let you unlock your device bypassing the google account.

• Download the FRP Bypass APK from the computer or through any device.
• Now, you have to place the tool in a USB drive.
• Turn on your device
• Follow the guided process until you reach to the google account including part
• Connect your device to the USB drive
• Install the FRP Bypass APK
• Open the app and go to settings
• Factory reset your device. then click on erase everything and confirm

for more details visit FRP Bypass APK

try provider

Pompeo, You may have to do a hard/factory reset to get it up and running. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
FAQ SAMSUNG J320P Galaxy J3 2016
How to Hard Reset Remove Password Samsung Galaxy Core Prime
How to reset your android if you forgot your password and google account
Galaxy J3 What do do if Forget my Screen Lock Password on my Samsung...

1. Enter wrong pattern 5 times and wait for 30 seconds.
2. Select "Forgot pattern" and enter your email account username and password.
3. Make sure you use the same account that was used to activate the device and double check the password by logging in to that email account in a browser.
4. If you don't have access to the original email account, you will need to do a hard reset and loose your settings and apps on the devcice. The data on the memory card will not be wiped though.
Note: if you can't remember your email password, you will have to visit the email service support page to get it reset.
also, see here...
http://www.androidtablets.net/forum/android-tablet-usage-tips-tricks/6280-forgot-your-unlock-pattern.html
or here... http://mytabletguru.com/forgot-password-pattern-unlock-of-android-tablet/

Well use your google account password to unlock the device. Keep using the pattern lock incorrectly until it asks for your email password and enter that.
If for some reason you don't have that, you will have to do a hard reset of the phone which WILL MAKE YOU LOSE ALL YOUR DATA IN THE PHONE.

How to hard reset:

Unlock pattern without Google account

If you also forget Google account details then what? Here we have solution for this and that is factory reset your android device. Lets talk about how to do it.

1. Power off your phone.
2. Now press Volume up, power and home button at the same time and wait until your device starts.
3. When you see logo screen release the power button and keep pressed the other two buttons.
4. Now your screen shows android system recovery and there is a list. Use Volume up or down keys to select option from the list. And select factory reset option and then press power button to let the action begin.
5. Now it asks you for confirmation, select "yes".
6. After factory reset completes, it again shows you android system recovery screen. Now select reboot option and after restart it will not ask you for pattern.

Reset the screen unlock pattern

If the incorrect screen unlock pattern is entered five times in a row, the phone is locked.
Note: In order to reset the screen unlock pattern you need to have a registered Google account on your phone. If you don't have a registered Google account on your phone, you must repair the phone software before tapping Forgot pattern.
To reset the screen unlock pattern by answering a security question:

1. If entering the incorrect screen unlock pattern five times, wait for 30 seconds and then tap Forgot pattern?.
2. Tap Answer question > Next.
3. Enter the answer for the security question.
4. Tap Unlock.

To reset the screen unlock pattern by entering Google account details:

1. Tap Enter Google accounts details > Next.
2. Tap the Username field and enter the phone registered Google account username.
3. Tap the Password field and enter the phone registered Google account password.
4. Tap Unlock.

To repair the phone software:

1. On the computer: Open PC Companion 2.0.
2. In the Support Zone application, click Start > Repair and follow the instructions on the screen.

Note: The installed software on your phone will be replaced, and all personal data stored will be lost.
Tip: If it is not possible to repair the phone software, please contact your Sony Ericsson Customer support.

Use a computer with Internet access and go to the Gmail WEB site and go to the Lost password section. Make sure you have an alternate Email address so they can sent you a temp. password so you can reset a password.

Locked android. Forgot google account. Need to reset. How to do this and what buttons to use.

Do u forgt ur security code or is ur phone locked to any network