Disclaimer - You are fully responsible for any damage / problems caused by overclocking. Not anyone else.
WARNING: just because your friend did it that doesnt mean you can! your processor is very different than his as you use it in a diffrent way than him!
please if you dont know anything about this read all about overclocking before actully try doing it!!!

This is a very simple way to overclock your N900, for more detailed guide refer to Jakiman's guide
and for an easier guide refer to Extremely easy OCing script

1. install "Enhanced Linux kernel for power users (settings)" it can be found in the app manager



2. install "rootsh" also can be found in the app manager



3. after finishing the steps 1 and 2 then simply reboot *shutdown the mobile then booting it"



4.open the terminal from the menu



5.type in the following:
DO NOT TYPE IN THE ASTERISKS AND THE MEANING OF THEM IS SHOWED BELOW

* lv is one type of a profile you can use LV,ULV,XLV and ideal depending on what works best with your N900
** this is the lowest frequency and you can change it to what suits your phone best
*** this is the highest frequency and you also can change it to what suits your phone best

Which will be like this:















Notes:
-Asterisks indicate the first frequency in the kernel which needs overvoltage.
-the minimum frequency while using ideal configuration is 500Mhz(no need to tamper with that if you want less frequencies you can use the ulv or lv or xlv)
if you really want to tamper with the minimum ideal frequency then follow the jakiman's guide i mentioned above

-Nokia is the default profile and the numbers below are the voltages it uses under the frequencies nearby (eg. at 600Mhz it uses 60)

6.okay so now you successfully overclocked your phone but the next time you reboot the phone will go back to the default frequencies

Note:use the phone for a few days and make sure its working fine before you do the following step

in order to save your frequency you will open the terminal again as shown in step "4"

and now you are done =D

to make a desktop widget in order to easily change the frequencies then follow this Link
and to show your frequencies then install Healthcheck
it has many other features and i think every N900 must have it

Good work, I would suggest you add a note to have the user play with the phone at least for a day before he saves the profile(you never know if it can fall into endless power cycles). Also for a total noob the more important instruction would be how to uninstall it once he freaks out

well ofcourse and your opinion is very appreciated
am still am going to write anathor guide with pictures on how to uninstall
the guide by titan is awfully hard for noob

Isn't it required to install the enhanced kernel itself before installing the "Settings" to be able to overclock?

No, from jakiman's guide

you need to note that loading ideal limits your freq to a minimum of 500MHz so you need to use the avoid freq command.
if you need to check that its working run
kernel-config show
after setting your limits

well its for new comers and it will only get them mixed up
so as you shall see i added a note that if they wish to do such a thing they can follow the other guide
as for the "kernel-config show"
again it will make things complicated
so ill add a picture tutorial on what everything means in it
thanks alot your suggestion is well appreciated

since it is for newcomers, you should make the disclaimers about how this can severely **** things up much bigger and prominent, including the stuff about how even if in one device it works the same numbers can permanently brick other devices

ah, i didn't look at the link

but to all newcomers its pretty easy to learn, i'd never used linux or done any programming of any kind and i've learn't loads since march with this device

yes but remmber they wont care about all that
all they want is to reach high speeds and thats it

and im glad you like linux as linux is my passion