Blocking mobile phones is different. As a rule, there are two main ways to protect information from your mobile phone: hide files and put a password to the device. Experts strongly recommend always to record their passwords in a place known only to you so that in the future I have not had to resort to unlocking forgotten passwords.
1
Lock SIM card. Usually purchasing a new SIM card, each user faces the default PIN code. As a rule, it is "0000". Mobile operators recommend changing the factory password to their own. If you wish, you can remove this type of blocking. To do this, go to the "Protection" or "Security" section (depending on the phone model) and remove the SIM protection. In this case, your phone will require enter the current PIN. The next time you turn on the phone, the PIN code will not be requested.
2
Phone blocking. This type of protection is similar to the previous one, only in this case the password must always be entered when the phone is turned on, regardless of the availability of the SIM card. You can enter a secret combination an infinite number of times, unlike the SIM card password, which is allowed to specify only 3 times incorrectly, after which the card will be blocked. Disable the phone lock can be the same way as SIM cards. To do this, go to the security settings of your device and select "Lock Phone" - "Turn off".
3
Graphic key. In the new android smartphones models, this type of blocking is used as a graphic key. If you forgot the combination, you can remove it in several ways - both with data loss and without. First, try entering a graphical key until a special window appears in which you can enter your Google account data - login and password.
4
In some smartphones, this option is available: call a locked phone, accept the incoming call. After that, roll the call window using the MENU or HOME buttons. Do not reset the call and go to the device settings, where you can turn off the graphic lock.
5
You can try to remove the graphic key from the phone through your Google account. Log in to your account, go to the "Security" menu - "Double-step authentication", after which enter the password from the mail. Next, go to the "Passwords" menu - "Password management" item, reite your password. After that, you can select the new password function for the application. Select the application and click "Create Password". After performing all operations, try using a new password to unlock the phone screen.
If none of the above methods helped to solve the blocking problem, it is likely that your phone needs to make a reset of settings and return to factory. However, remember that this method will delete all the data from your device. It is recommended that a specialist conducts this procedure.
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did not help T_T how to do it with a push-button phone
Thank you very much ! Helped 5 way. And this is despite the fact that the button "No" did not turn on.