My friend's mobile phone is Lenovo E520. He set the password of the information lock, but now he forgot the password. Who will unlock it?

Before introducing all kinds of passwords, let's analyze the following two concepts: "Network operators and suppliers (or?

Internet service provider) ". Network operators are the organizations responsible for the normal work of GSM (Global System for Mobile Communications) networks. Different countries have different network operators. In China, the largest network operator is China Telecom. Suppliers are responsible for the access of mobile phones to GSM networks, such as China Mobile Communication and China Unicom (a network that rents telecommunications). As far as users are concerned, we only contact suppliers, so if there is any problem with the mobile phone (except the mobile phone itself), we just need to find China Mobile or China Unicom to solve it.

Below I will introduce the respective uses of commonly used mobile phone passwords:

1. Mobile phone password

The mobile phone password is used to prevent the mobile phone from being stolen. After the function of "Privacy Settings"-"Power-on Password"-"Phone Password" is turned on, the phone can only be used when it is turned on, that is, this password is a lock of the phone itself. Generally, the default value of mobile phone password is 1234 (such as Motorola's T2688) or 0000 (such as Panasonic's GD90 and Samsung600c).

2.pin 1 code

Pin 1 code is a personal identification number provided by the supplier to protect the secret of Sim card. After the function of "Privacy Settings"-"Power-on Password"-"PIN" is turned on, you need to enter the pin 1 code to use the mobile phone, that is, this password is a lock on the Sim card. The default value is 1234. If the mobile phone password and pin 1 code

At the same time, enter the pin 1 code first, and then enter the mobile phone password. Pin 1 code will be locked after three mistakes, so it needs to be used.

Puk 1 unlock.

3.puk 1 code

Puk 1 code is the unlocking code of pin 1 code provided by the supplier, which is an irregular series of numbers. Puk 1 lost ten times.

Wrong, the sim card will be permanently locked, so the sim card has to be replaced.

4.pin2 code

Pin2 code is another password of sim card provided by the supplier, which is used to restrict the personal identification code of dialing and other functions. It is mainly used to eliminate the data of telephone charges, set the charging currency and charging unit of telephone charges, limit the charging function and limit dialing (after "Privacy Settings"-"Limit Dialing" is turned on, the mobile phone can only dial the number set in it and cannot use the telephone book). The default value of my sim card is 2345. Pin2 code will be locked after three wrong entries, and it needs to be unlocked with puk2.

5.puk2 code

Puk2 code is the unlocking code of pin2 code provided by the supplier, which is an irregular series of numbers. Puk2 lost ten times

Wrong, the sim card will also be permanently locked, so we need to replace the sim card.

Note: The codes of pin 1, pin2, puk 1 and puk2 can be inquired from suppliers, and pin 1 and pin2 can also be modified by themselves (knowing the original password).

6.sim card unlock code

Mainly used to unlock the function of "locking sim card". In order to prevent an unknown sim card from using the mobile phone without permission, the function of "Lock sim Card" ("Security Settings"-"Lock sim Card") can be turned on. In this way, if the sim card in the mobile phone is not allowed, you should enter the unlock code according to the prompt when starting the phone. The default value is 00000000. Many friends often ask how to identify the production date of their machines, which is very simple for Panasonic mobile phones.

Mobile phone lock: *2767*2878#/*2767*7377#

Samsung chip reset: *2767*3855# can also be used for unlocking or locking.

Samsung monitor temperature and battery capacity: *#0228#

Samsung Tone Display Contrast: *#0523#

Samsung Software Version: *#9999#

Samsung A 100-A 188 see version: *#0837#

Motorola T2688 unlock all locks: 19980722

T2688/1988/988d/988d in Chinese: *#0000# OK (card)

All Motorola locks: press menu +5+ 1/2.

Siemens returned to factory settings: *#9999#

Siemens scribbled back to Chinese: *#0000#/*#0086#

Siemens Software Version: *#06# Left key

Ericsson returns to English: *#0000#

Ericsson's new machine returns to English: press CLR- left key -0000- right key.

Ericsson shows the factory date: right, *, left, left, *, left, *.

Nokia factory date: *#0000# (plug-in card)

Nokia saves 30% electricity: * # 746025625 #

Philips forced reconnection: *#2562*#

Philips displays and changes the mobile phone password: *#7489*#

Bosch) 909S reply to Chinese: *#0852#

BOSCH)909s back to English: *#085 1#

NEC display software version: *#2820#

NEC restores the original factory settings: *#73738#

Hidden function of waveguide s 1000: *#*# 1705#

Waveguide s 1000 Unlocked: *#*# 1705#46 (also used for 999D and 720)

If it crashes, use it again -2468 1357 (or use it directly)

Waveguide 8xx/9xx series: * #+serial number 7-65438+ bit 04 #

Delete the last bit from the last 9 bits of the serial number of the SIM card waveguide.

Alcatel OT22 1/220 unlocked: 25228352/ Alcatel+d.

Alcatel OT30 1/302 Unlocked: 83227423

Alcatel OT500/700 Unlocked: 25228352

Konka: * # 0001# * #1001#1#

Konka Xiaoxue 52 19: # 8879576 # Original: 1234

GVC: * # 100 1 * (Haier)

South Institute of Technology 320 starts, enter ## 100 1#, then load the card and enter 0000 OK.

Mitsubishi netlock: * 787090 or *787292

Mitsubishi imsi lock: * 362628 or *360608

Mitsubishi NetSubLock: * 476989

Mitsubishi cplock: * 482896 or *480896

Mitsubishi splock: * 967678

Mitsubishi extension lock: * 574243

General secret technology of Philips mobile phone

When the phone is in standby mode, please enter the following key combinations:

*#06# View IME string code

*#2254*# Display status line

*#2255*# Debugging call mode

*#2558*# Displays the call time.

*#2562*# Force reconnection to the network system.

*#7489*# Display and change the phone password.

*#7378*# Displays some SIM card information, such as phaselevel.

*#3377*# Read the SIM card information, initialize and mark it.

*#7693*# Turn the sleep mode on or off.

*#8463*# Reading sleep mode information

*#337*# EFR mode on/off

*#4764*# Single frequency/dual frequency? Staring at grapefruit? Switch single frequency GSM900)

*#4765*# Single-frequency/dual-frequency setting (switch single-frequency GSM 1800)

*#4762*# Single Frequency/Dual Frequency Settings (Switch to Dual Frequency Mode)

Alcatel test key

In standby mode, enter "000000*" to monitor network conditions, including signal strength and channels being used.

Enter the following keys for NEC DB2000 mobile phone password in standby mode:

"*#2820#", and then press the call button to display the software version of the mobile phone.

"*73738#", and then press the call button to restore the mobile phone to the factory state.

Samsung's early version of the mobile phone, you can enter the following instructions to enter the test state:

Key code test function/name

*#9999# Displays the version number of the mobile phone software.

*2767*2878# Mobile phone is currently reset (the mobile phone has been unlocked).

*2767*3855# telephone EEPROM total reset (software fault repair)

*#9998*228# battery parameter reading

*#9998*289# Ringing signal frequency test

*#9998*246# Program parameter display

*#9998*364# watchdog signal test

*#9998*377# EEPROM error display

*#9998*427# Watchdog signal path setting

*9998*523# LCD Contrast Adjustment

*9998*636# storage status display

*9998*786# Read the current date and time.

*9998*842# vibrator vibration test

*9998*947# Reset the settings when a major error occurs.

*9998*9266# shows the receiving channel number and receiving intensity.

The test instructions supported by the new Samsung mobile phone (starting from the new Samsung 600) are greatly reduced, and basically only the following can be successful:

*2767*2878#(EEPROM reset)

*2767*3855#(EEPROM is always reset, and IMEI may become the initial code)

*#9999# (version check)

*#0523# (adjust LCD contrast)

*2767*7377# (Reset command to unlock mobile phone password)

Especially for the input of *#0523#, some models of mobile phones need to be plugged in and some don't. In addition, if the input is successful once and fails again, it is because of the memory effect of the mobile phone software. You can remove the battery of the mobile phone and reinstall it, and then try to input it (for example, after inputting the command *2767*3855#, sometimes the mobile phone cannot be turned on without reinstalling the battery).

Samsung SGH-N288 Mobile Phone Test Manual

*#000 1# displays RS232 serial communication parameters.

*#0228# Displays battery capacity, voltage and temperature.

*#0246# Program parameter display

*#0324# Network Detection (Engineering Mode)

*#0364# shows the watchdog status, which can be modified.

*#0377# EEPROM error display

*#0427# Watchdog signal path setting

*#0523# Adjust the contrast and modify it carefully;

*#0636# Memory capacity display

*#0746# SIM card file specification test

*#0778# SIM card information

*#0786# display shows the time of this startup and the time from this startup to now. Press->; After displaying the latest time from this boot to now; Press->; After displaying the last boot time; Press->; After that, the last shutdown time and the last switching time are displayed.

*#0837# Displays the detailed software version.

*#0842# Vibration test

*#0947# Reset setting instruction in case of major error.

*#9999# Display software version

*2767*2878# EEPROM is reset, and the mobile phone settings are always clear and can be used for unlocking.

*2767*3855# Take out the program from the font and reset the EEPROM to the factory value. For the mobile phone with modified IMEI code, this command can restore the original body number. This instruction is also used for various faults caused by program disorder in EEPROM (chip).

Siemens China machine cheating was made public.

Enter [* # 06 #] to view the IMEI (International Mobile Equipment Identity) code.

Enter [* # 06 #]+[ left soft key] to view the software version number. The above can be operated without inserting a SIM card.

Enter [* # 0000 #]+[ Start key] to change the default language display (English? )。

Enter [* # 000 1 #]+[ Start key] to display in English.

Enter [* # 0086 #]+[ Start key] to change the display to Simplified Chinese.

Enter [* # 0886 #]+[ Start key] to display in traditional Chinese.

Quick key

Press and hold [*] to turn the ringtone on or off.

Press and hold [#] to open or close the keyboard lock.

Press and hold the [upper left key] to open the profile settings.

Press and hold the [lower left key] to turn on voice dialing.

Press [Recording key on the right] to play the recording, which can be played at any time, including during the call, and both parties can hear it.

Press and hold the [right recording key] to start recording until it is released or 20 seconds have passed.

When using the keyboard lock, you can press and hold the [Hang-up key] to temporarily turn on the luminous lighting.

Double-click [Phone Book] to enter the VIP phone book.

[1]+[ Start key] can enter the voicemail (you need to set the voicemail service number in [menu → SMS → voicemail]).

[0]+[ left soft key] can switch 1 Line 2 (it seems that it is not supported in most areas, including Zhuhai).

[Number keys]+[#] can display the phone book name stored in this location of the SIM card (provided that at least one phone is stored in the SIM card).

Press [0] for a long time, and the+word will appear. You can use the left soft key to select the national long-distance telephone code (the location is arranged by English name).

Shortcut key setting: [Numeric key] → [Left soft key] → [Right soft key] (change) options will appear, which can be selected (if a phone number is selected, you can enter the phone book to select the phone name to be transmitted quickly).

Just use [number keys] → [launch key].

Unlocking method of Siemens mobile phone lock machine

Please enter the unlock code directly when the phone is turned on, and then wait for the automatic unlock. The time varies from 1 sec to 60 minutes.

Nokia factory date: *#0000# (plug-in card)

Nokia saves 30% electricity: * # 746025625 #

Sony Ericsson shows the factory date: right, *, left, left, *, left, *.

`````` or you can go to your local mobile phone repair and have a wash, and that's all!

(Friends who need to reprint please declare here! This article was created by user: CTP906. Or it will be exposed to the end! ! ! )