if my memory hasn't failed me (yet), there is a feature which can be enabled where you need to enter your password each time a content is being purchased.

Can i buy a (legit) iTunes Gift Card from SG (like say HMV) and use it on iTunes (US account)?

oh. then there is nothing much that can be done actually.

but if it any consolation, you need a valid license to play your purchased contents.

hence if it feel that your account has been compromised, you can either change the password or bring this to the attention of the apple personnel

Actually jailbreaking the phone won't slow it down, installing too many mobile substrate apps especially Winterboard will cause some lags to the system. Mobile Substrate add ons/apps will increase the memory usage thus slowing down the phone. Just now I did some experiments with 2 phones, 1 with Winterboard and 1 without. The result:

Without Winterboard
- Apps open within 2-3 secs
- Apps crash less

With Winterboard
- Apps open within 5-6 secs (more than 100% increase in time)
- Apps prone to crash (due to high usage of memory)

You can test it yourself if you have Winterboard and SBSettings installed. Run the phone in Safe Mode and you'll see the difference.

iTunes states that I have 470+ MB of apps
But I merely have 4 games and 8 apps which take up to almost 200MB
And, save games and settings can be as much as 200+ MB right?
I assume that the extra 250MB are slowing down my performance.

Do I need a restore?

r u certain tat u hv tat many apps?
how many apps r listed in ur app folder/tab?

if we r talking in terms of performance...it wud not heavily effect if u hv many apps...more or less is like tis..n tis is wat i tink...if thr is a different explanation... i'll be glad 2 hear...
we download an app, may it be 10mb or 100mb..it wud get stored in the phone..meaning it wud takie up x mb out of the 8/16gb...
our rom, is 128mb...tis is wat affects our performance...issues with lag, crash r all caused by rom overload...
in ur case, u hv arnd 200plus mb of app...tis is all stored in the phone n only take up the memory if u launch it...
so, u dun really hv 2 wurry abt da extra 200mb slowing ur phone down...

Good for you. But for people like us, we will have to wait as we jailbreak our phones. Cheers.

Correction mate. For 2G iPhones, every firmware has to be unlock with tools from DevTeam or etc may it be 3.0, 3.0.1 , 3.1 etc as it has been since iPhone existed. 

Your info is only applicable to 3G iPhones(Officailly Unlocked) whereby we 3G iPhone users can upgrade once Apple seeds the new firmware without having to wait for Devteam to come up with a tool.

Those who have jailbreak their 3G iPhones would probable wait till DevTeam provides the tool to jailbreak before they upgrade as many are accustom to 3rd party software.

As i recall back, upgrading from 2.2 to 2.2.1, you can upgrade with iTunes withut losing your data but not from 2.0 to 2.2.1.

The whole reason of using DevTeam tools is to be on the safe side rather than getting lock back and face with a emergency screen as Hanxz has experience it numerous of time after upgrading from iTunes. We have cases where 2G iPhones users get locked after a firmware upgrade from iTunes countless of time.

Anyway, am looking forward to 3.0 with all it's goodness.

Cheers

@ilyas_jamal

read this on how to remove Cydia apps: http://forum.lowyat.net/topic/763530

My Apps all grey colour(cant press anything) when i press the applications tab..... but video musics can press...

Based on my personal research, the maximum sec u can use for the ringtone is 40 sec