Frezz screen at enter passcode - Apple iPod touch

(Assuming you're working from iOS 9.2 or recent versions)

From the home screen, swipe the screen down to start spotlight search.

Type "Settings" in to the search field.

Once settings opens swipe down slightly to reveal a search bar at the top of settings menu.

Type "Passcode" and select the third option down which is "turn passcode off".

Enter your passcode (re-enter if necessary).

Towards the bottom of the page select "Turn Passcode Off" and enter your passcode twice again.

The following can be done on ipad with iOS 8:
1. Press the home button( the round button on the front side of your ipad), to go to the home screen.
2. Find the Settings icon ( looks like gray clockwork gears) and tap on it to launch the Settings app.
3. After settings app is started try to find on the left side of the screen Passcode ( has a red lock icon near the text) and tap on it
4. In the passcode setting screen you can choose the type of passcode with the Simple passcode setting switched on or off ( simple means a 4 digit number, not simple means any character combination
5. By taping on Turn passcode on you can enter your passcode. Be carefull not to forget your passcode, otherwise you will not be able to use your ipad later.

Actually you can. Just follow below steps to turn off screen lock.
To turn off lock screen on iPhone means to turn off passcode. So your lock screen'd disappear as long as your passcode is disabled. Here's how you can disable passcode on iPhone.
Step 1: Open Settings then tap Touch ID & Passcode.

Step 2: The Turn Passcode Off option is right on top of the setting, just tap it and move on to the third step

Step 3: Your original passcode is needed if you are trying to disable the passcode. Enter your original passcode.

Step 4: There is a popping out box asking for your confirmation of turning off the password, tap Turn Off and the iPhone screen lock will be turned off.

When the passcode is disabled, you will no longer have to enter it. But what if you just do not want to enter it over too frequently without turning off lock screen iPhone? The following instructions will show you how to do this.



For more details, please check: How to turn off lock screen on iPhone

JUST RESTORE YOUR PHONE IN DFU MODE WITH LATEST UPDATE
ALL DATA WILL BE LOST SO BE SURE TO BACKUP ALL

FOR DFU MODE
CONNECT YOUR PHONE TO PC
HOLD POWER + HOME BUTTON WHEN SCREEN GOES OFF
COUNT UPTO 6 AND RELEASE POWER BUTTON WHILE HOLDING HOME BUTTON

With the push of a button and pull of a slider, you can quickly access all of your iPad's contents, including any sensitive personal data that you've stored within it.

Such easy and unrestricted accessibility to your device could be dangerous in the hands of a stranger, which is why you enable a password to block its use by anyone but you.

If you believe that your password's confidentiality has been compromised, don't fret. You can change it using your iPad's Passcode Lock feature.

Tap "Settings" on the home screen.
Tap "General" on the left sidebar.


Tap "Passcode Lock" on the main pane to the right.
Type your current four-digit passcode in the "Enter Passcode" screen that appears.


Tap "Change Passcode." Type your current four-digit passcode again in the first "Change Passcode" screen that appears.


Enter a new four-digit passcode in the second "Change Passcode" screen.
Retype your new four-digit passcode in the third "Change Passcode" screen.

This will simultaneously verify and activate your new passcode.

http://support.apple.com/kb/HT4113
iOS: Using passcodes

http://support.apple.com/kb/ht1212
iOS: Forgotten passcode or device disabled after entering wrong passcode

iPhone setting:*
- Auto-Lock: 1 Minute;*
- Passcode Lock: On, require passcode immediately, after 15 min or 4 hours etc;*
- Network: Turn 3G Off

Scenario 1: Home screen is active with screen on*
1. Press power button for seconds until asked to '"slide to power off"
2. Slide to power off
3. press power button to turn on iPhone
4.*When asked to enter passcode, touch the "Cancel" key, then slide to unlock
5. bypassed passcode

Scenario 2:*
1. On the screen of being asked to enter passcode, press power button for seconds until asked to '"slide to power off"
2.*Slide to power off
3. press power button to turn on iPhone
4.*When asked to enter passcode, DO NOT touch any key on the screen, press power button for seconds until asked to '"slide to power off"
5. Slide to power off
6. press power button to turn on iPhone
7.*When asked to enter passcode, touch the "Cancel" key on the right bottom corner, then slide to unlock
8. bypassed passcode

Notes:
1. When Network setting changes to Enable 3G: ON, "3G" signal shows up, passcode CANNOT be passed through
Go to a underground parking lot or a lift where 3G signal is weak, when 3G signal switches to "E" (Edge), passcode CAN be passed through following above steps
2. When no 3G or Edge signal, above steps don't work

Conclusion:
Seems passcode security is related to network status
Possible security hole under Edge

Give this a try.

1. Press the [Machine Status] button on the Control Panel. 'Machine Setup' will be displayed on the Display Screen.
2. Press the [Up] or [Down] arrow button until 'System Admin Tools' is selected, and then press the [Enter] button.
3. If the System Admin Tools has been passcode protected, 'Enter Passcode' will be displayed. Enter the passcode, and then press the [Enter] button. If the passcode is unknown, or has been forgotten, contact your System Administrator.
   
   If the System Admin Tools has not been passcode protected, 'Passcode Protect' will be displayed. Continue with step 4.
   
   NOTE: If the Enter button is pressed, 'Passcode Protect (No)' will be displayed. Press the Menu / Exit button to return to the previous screen, and then continue with step 4.
   
   
4. Press the [Left] or [Right] arrow button until [Clear Memory] is displayed, and then press the [Enter] button.
5. Press the [Left] or [Right] arrow button until [System Data] is displayed, and then press the [Enter] button. All data and settings will be cleared from memory.
6. Press the [Stop] button to return to the Standby mode.

When you do this you will have to go in and change the power save mode back to where ever you had it set.

If you have forgotten your iPhone’s Passcode you will need to restore your phone via iTunes.

1. First you have to put your phone into the restore mode which is a slightly fiddly process.
2. Plug your iPhone into your PC or Mac with the USB cable
3. Press and hold the power button at the top and then slide to power off the iPhone
4. Press the power button to power the iPhone on and keep it held while simultaneously pressing the home button
5. After a few seconds a yellow alert triangle will appear and the iPhone will say it is iPhone Restore Mode.
6. Open up iTunes and click on the Summary tab
7. Click on Restore to restore your iPhone. This will reset all your iPhone’s setting to the factory defaults, including the Passcode.

You should then follow these steps below to activate the passcode again.

1. Click the Home button to bring up the main menu
2. Click on Settings
3. In the Settings screen click on General
4. In the General screen click on Passcode Lock
5. This will open the Set Passcode screen. Enter a memorable 4-figure code and re-enter it when prompted
6. You will now be at the Passcode Lock screen. You can change when you are prompted to enter the Passcode. The default setting – Immediately – means you will be asked to enter it as soon as your start using the iPhone. But you can change the setting so that the prompt appears after a certain period of use
7. Press the Home button to return to the main menu.

Bad News... you may have to Restore from iTunes. Here is some info from the users manual:
Passcode Lock By default, iPhone doesn’t require you to enter a passcode to unlock it. Set a passcode: Choose General > Passcode Lock and enter a 4-digit passcode, then enter the passcode again to verify it. iPhone then requires you to enter the passcode to unlock it or to display the passcode lock settings.
Turn passcode lock off: Choose General > Passcode Lock, enter your passcode, and tap Turn Passcode Off, then enter your passcode again. Change the passcode: Choose General > Passcode Lock, enter your passcode, and tap Change Passcode. Enter your passcode again, then enter and reenter your new passcode.
If you forget your passcode, you must restore the iPhone software. See “Updating and Restoring iPhone Software” on page 204.
Set how long before your passcode is required: Choose General > Passcode Lock and enter your passcode. Tap Require Passcode, then select how long iPhone can be idle before you need to enter a passcode to unlock it.

To access the serial number from the Control Panel:

1. Press the [Machine Status] button on the Control Panel. 'Machine Setup' will be displayed on the Display Screen.
   
   
   
   
2. Press the [Up] or [Down] arrow button until 'System Admin Tools' is selected, and then press the [Enter] button.
3. If the System Admin Tools has been passcode protected, 'Enter Passcode' will be displayed. Enter the passcode, and then press the [Enter] button. If the passcode is unknown, or has been forgotten, contact your System Administrator.
   
   If the System Admin Tools has not been passcode protected, 'Passcode Protect' will be displayed. Continue with step 4.
   
   NOTE: If the Enter button is pressed, 'Passcode Protect (No)' will be displayed. Press the Menu / Exit button to return to the previous screen, and then continue with step 4.
   
   
4. Press the [Left] or [Right] arrow button until 'Maintenance' is displayed, and then press the [Enter] button.
5. Press the [Left] or [Right] arrow button until 'Serial Number' is displayed, and then press the [Enter] button. The serial number will be displayed.
6. If ther serial number is not diosplayed, enter it via the keypad.