iPhone Error 21 and Solution

iPhones can give you many errors. And, if you are downgrading your iPhone then you might have encountered Error 21. So, do you get this Error 21 frequently?

If yes, then the problem is, instead of landing in Device Firmware Upgrade (DFU) mode you are ending up in Recovery mode.

Now, if you can get back to DFU mode that will solve your problem. Once the iPhone is in (DFU) mode, you can follow the following process to downgrade your iPhone.

Procedure

When the iPhone is in DFU mode, this mode will bypass the operating system that is currently installed. This process aids in downgrading or upgrading your Operating System in iPhone. Remember, DFU mode is different from the usual Recovery mode.

The difference between the two modes can be spotted below:

Here, you can see there is no backlight and the screen is blank and black. This indicates that the phone is in DFU mode.

In the figure below, you can see a cable connecting to iTunes icon on the screen. This indicates that the screen is in Recovery Mode.

If there is something on the screen, then that means you are not in the DFU mode.

You have a process that can load the iPhone in DFU mode. Check out that process here:

• First, you need to plug in your iPhone to your Computer.
• Now, turn your phone off.
• Now, for the span of 10 seconds precisely, hold the Power and Home buttons together.
• Now, continue holding the home button and release the power button.
• This has to be done until you hear a beep sound from your Computer
• Now you should see a blank screen sans any display. This indicates that you are in DFU mode.
• Now your restore should work accurately.

If you are having trouble with the 10 seconds time frame, then try adjusting the time to fewer seconds as per your requirement.

So, next time if you have trouble with Error 21, then try restoring the iPhone with this process.

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How To Reinstall Internet Explorer

1. Insert the Win XP CD

2. Open Start / Run and type:



rundll32.exe setupapi,InstallHinfSection DefaultInstall 132 c:\windows\inf\ie.inf

Press ENTER

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Speed up IE7 ( Internet Exlporer 7 )

Now there comes a time in a man life when you have to choose which browser you’re going to use. But for me I picked both, sometimes I want to see whats on the other side. Now Looking for tweaks For IE7 can be a little difficult because almost all articles about tweaking IE7 are all automated and you have to install a third party tweaking software which I don’t like. so what else could do, but to fire up my Registry Editor.

Now We can speed up IE7 page loading especially on multiple tabs and look for this key

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
“MaxConnectionsPerServer”=  Changedit to dword:00000010
“MaxConnectionsPer1_0Server”=Changed it to dword:0000010

Since I rarely use IE7… so Its a bit rusty when i opened it to try it for the first time.. but after closing and restart IE a noticed a difference and ohhh yeahh.. it’s goodboom you’re done.. Exit regedit restart your PC and enjoy the fast loading of pages.

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Windows uses 20% of your bandwidth Here's how to Get it back

A nice little tweak for XP. Microsoft reserve 20% of your available bandwidth for their own purposes (suspect for updates and interrogating your machine etc..)

Here's how to get it back:

Click Start-->Run-->type "gpedit.msc" without the "

This opens the  group policy  editor. Then go to:


Local Computer Policy-->Computer Configuration-->Administrative Templates-->Network-->QOS Packet Scheduler-->Limit Reservable Bandwidth


Double click on Limit Reservable bandwidth. It will say it is not configured, but the truth is under the 'Explain' tab :

"By default, the Packet Scheduler limits the system to 20 percent of the bandwidth of a connection, but you can use this setting to override the default."

So the trick is to ENABLE reservable bandwidth, then set it to ZERO.

This will allow the system to reserve nothing, rather than the default 20%.

I have tested on XP Pro, and 2000

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How to create a disk image of a DVD or CD using the terminal

This is a little bit advanced, but useful.

1. Insert the DVD/CD into your drive.

2. Run the TERMINAL application (In your Appplications Utilities Folder)

You will get a little window with a prompt something this: Macintosh:~ wayne$

3.Type the following and then hit return:

drutil status

It will give you some info like this:

Vendor Product Rev
SONY DVD RW DW-U21A AADB

Type: DVD-R Name: /dev/disk2
Cur Write: 4x DVD Sessions: 1
Max Write: 4x DVD Tracks: 1

This is information about your DVD/CD drive and the important thing to notice is the name, it will be /dev/disk1 or /dev/disk2

4. If it is disk1 type this: (If the name is different (eg disk2) then just replace all the disk1 references with disk2.)

diskutil unmountDisk /dev/disk1

This will make the DVD icon disappear from the desktop.
5. Type the following:

dd if=/dev/disk1 of=~/Desktop/file.iso bs=2048
6. Wait about 10 or 20 minutes while it now makes an image of the CD/DVD onto your desktop.

When it’s finished it will give a message like this:

2170784+0 records in
2170784+0 records out
4445765632 bytes transferred in 1335.111379 secs (3329884 bytes/sec)

7. Type this to make the DVD reappear on the desktop and you are done:

diskutil mountDisk /dev/disk1

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How to turn on automatic logon in Windows XP

Method 1:

You can use Registry Editor to add your log on information. To do this, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate the following registry key:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
3. Using your account name and password, double-click the DefaultUserName entry, type your user name, and then click OK.
4. Double-click the DefaultPassword entry, type your password under the value data box, and then click OK.
   
   If there is no DefaultPassword value, create the value. To do this, follow these steps:
   1. In Registry Editor, click Edit, click New, and then click String Value.
   2. Type DefaultPassword as the value name, and then press ENTER.
   3. Double-click the newly created key, and then type your password in the Value Data box.
   Note: If the DefaultPassword registry entry does not exist, Windows XP automatically changes the value of the AutoAdminLogonregistry key from 1 (true) to 0 (false) to turn off the AutoAdminLogon feature after the computer is restarted.
5. Double-click the AutoAdminLogon entry, type 1 in the Value Data box, and then click OK.
   
   If there is no AutoAdminLogon entry, create the entry. To do this, follow these steps:
   1. In Registry Editor, click Edit, click New, and then click String Value.
   2. Type AutoAdminLogon as the value name, and then press ENTER.
   3. Double-click the newly created key, and then type 1 in the Value Data box.
6. Exit Registry Editor.
7. Click Start, click Restart, and then click OK.

After your computer restarts and Windows XP starts, you can log on automatically.

If you want to bypass the automatic logon to log on as a different user, hold down the SHIFT key after you log off or after Windows XP restarts. Note that this procedure applies only to the first logon. To enforce this setting for future logoffs, the administrator must set the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Value:ForceAutoLogon
Type: REG_SZ
Data: 1

Method 2:

You can also turn on automatic logon without editing the registry in Windows XP Home Edition and in Windows XP Professional on a computer that is not joined to a domain. To do this, follow these steps:

1. Click Start, and then click Run.
2. In the Open box, type control userpasswords2, and then click OK.
   
   Note When users try to display help information in the User Accounts window in Windows XP Home Edition, the help information is not displayed. Additionally, users receive the following error message:
   Cannot find the Drive:\Windows\System32\users.hlp Help file. Check to see that the file exists on your hard disk drive. If it does not exist, you must reinstall it.
3. Clear the "Users must enter a user name and password to use this computer" check box, and then click Apply.
4. In the Automatically Log On window, type the password in the Password box, and then retype the password in the Confirm Password box.
5. Click OK to close the Automatically Log On window, and then click OK to close the User Accounts window.

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How to connect your iPhone or iPod to your home stereo.

To connect your iPhone, iPad or iPod to your home stereo you just need a 3.5mm to RCA cable like this cable here. The RCA cable plugs into the rear of your stereo and the 3.5mm plugs into your iPhone headphone jack.

When plugging into the back of the Stereo Amplifier, you can use almost whatever inout you want: CD-INPUT, TAPE-IN, TV-IN, DVD-IN or the AUX-IN,  but do not use the PHONO-IN as it is designed specifically for a record player and won’t sound as good.

For the best results set your iPhone volume to about half. If it’s too quiet you may get noise and hiss. If it’s too loud you may get some distortion.

You can have the USB charger plugged into the iPod at the same time.

If you want you can use an Apple iPod dock, and leave the audio and charger cable plugged into the dock permanently. The dock has a line out so that it doesn’t matter what volume the iPod is set to, and it will also charge your iPod, and has a remote control.

If you are buying a new Stereo, Pioneer and others are now including AIRPLAY into some of their amplifiers. The amplifiers have a Wi-Fi receiver built in which means you can play from your iOS device over your Wi-Fi (Airport) network directly to your Stereo with no loss of quality. You don’t need to connect any cables.

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