There are many softwares that can be used to hide folders in Nokia mobile phones, but there is a trick that you can use to hide any folder in your mobile.
Simply, make a new folder, for example, misc.jad (you may use any word, but you must include the ".jad" extension for it to work), then put all files that you wanted to hide in it.
After this, make another folder like misc.jar (again, you may use any word, but you must include the ".jar" extension for it to work).
When you make the misc.jar folder, the misc.jad folder will be hiden.
If you want to see your files again, simply delete misc.jar, then, the misc.jad folder will be visible.

NOKIA UNIVERSAL CODES

These Nokia codes will work on most Nokia Mobile Phones

(1) *3370# Activate Enhanced Full Rate Codec (EFR) – Your phone uses the best sound quality but talktime is reduced my approx. 5%

(2)#3370# Deactivate Enhanced Full Rate Codec (EFR) OR *3370# ( Favourite )

(3)*#4720# Activate Half Rate Codec – Your phone uses a lower quality sound but you should gain approx 30% more Talk Time.

(4)*#4720# Deactivate Half Rate Codec.

(5)*#0000# Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release Date, 3rd Line : Compression Type. ( Favourite )

(6)*#9999# Phones software version if *#0000# does not work.

(7)*#06# For checking the International Mobile Equipment Identity (IMEI Number). ( Favourite )

(8)#pw+1234567890+1# Provider Lock Status. (use the “*” button to obtain the “p,w”
and “+” symbols).

(9)#pw+1234567890+2# Network Lock Status. (use the “*” button to obtain the “p,w”
and “+” symbols).

(10)#pw+1234567890+3# Country Lock Status. (use the “*” button to obtain the “p,w”
and “+” symbols).

(11)#pw+1234567890+4# SIM Card Lock Status. (use the “*” button to obtain the “p,w”
and “+” symbols).

(12)*#147# (vodafone) this lets you know who called you last.

(13)*#1471# Last call (Only vodofone).

(14)*#21# Allows you to check the number that “All Calls” are diverted to

(15)*#2640# Displays security code in use.

(16)*#30# Lets you see the private number.

(17)*#43# Allows you to check the “Call Waiting” status of your phone.

(18)*#61# Allows you to check the number that “On No Reply” calls are diverted to.

(19)*#62# Allows you to check the number that “Divert If Unreachable (no service)” calls
are diverted to.

(20)*#67# Allows you to check the number that “On Busy Calls” are diverted to.

(21)*#67705646# Removes operator logo on 3310 & 3330.

(22)*#73# Reset phone timers and game scores.

(23)*#746025625# Displays the SIM Clock status, if your phone supports this power saving feature “SIM Clock Stop Allowed”, it means you will get the best standby time possible.

(24) *#7760# Manufactures code.

(25)*#7780# Restore factory settings.

(26)*#8110# Software version for the nokia 8110.

(27)*#92702689# Displays – 1.Serial Number, 2.Date Made, 3.Purchase Date, 4.Date of last repair (0000 for no repairs), 5.Transfer User Data. To exit this mode you need to switch your phone off then on again. ( Favourite )

(28)*#94870345123456789# Deactivate the PWM-Mem.

(29)**21*number# Turn on “All Calls” diverting to the phone number entered.

(30)**61*number# Turn on “No Reply” diverting to the phone number entered.

(31)**67*number# Turn on “On Busy” diverting to the phone number entered.

(32)12345 This is the default security code.

Google Instant: The New Way To Search

Google, which can already feel like an appendage to our brains, is now predicting what people are thinking before they even type. On Wednesday, Google introduced Google Instant, which predicts Internet search queries and shows results as soon as someone begins to type, adjusting the results as each successive letter is typed.

“We want to make Google the third half of your brain,” said Sergey Brin, Google’s co-founder and president of technology, speaking at a Google press event at the San Francisco Museum of Modern Art. Marissa Mayer, Google’s vice president for search products and user experience, added, “There’s even a psychic element to it.”

Google’s new psychic powers result in much faster searches, but the change might affect the many businesses that have been built around placing search ads on Google and helping Web sites figure out how to climb higher in search results to increase revenue.

It is a sign that even as Google expands into other businesses, like display advertising and cellphones, it remains firmly focused on search, its core business and one that accounts for more than 90 percent of its revenue. It has faced competition recently from Microsoft’s Bing search engine.

Google has made its new product the default way to search the Web. Instant works with the most popular modern browsers in the United States and several other countries. It will show up on cellphones and in browser search bars in a few months.

Google Instant, which you can read about on Google’s Web site and also on the company’s blog, is very self-explanatory, except for three issues.

First, as you type, Google delivers the search results for the most likely completion of your search terms. It also pops up a list of five most likely completions for your search. If you want to scroll through the instant results for those alternate completions, don’t click on them with your mouse. Instead, use the arrow keys on your computer’s keyboard to hop down and up through them. If you instead click on one of the alternate completions, Google will make the rest of the list go away and show you the results for that one term.

Second, if you reach Google through a browser toolbar or through the Chrome browser’s omnibar, Google Instant will not yet work for you. To get the Instant results, go to Google.com and use that instead. (It also is not ready for mobile phones yet, the company said.)

Third, if you really hate it, here’s how to turn it off: If your browser has Google Instant enabled, go to the google.com homepage and look to the right of the search box. You should see a link in tiny blue type: “Instant is on.” Click that, and up pops a menu to turn Google Instant on or off, as well as another option to learn more about the feature.

Google Instant uses much less Internet bandwidth than you might think, because its proposed search results are optimized to take up very little data space compared with even a small photo. Also, if you have configured Google to deliver more than 10 search results per page, the Instant feature will set your results count back to 10. If you prefer to read through long lists of results, turn Instant off.