iphone 4 software update

If it is a true, officially unlocked iPhone you will have no problem at all.

If it was unlocked through a hack it will relock to whatever carrier it was formerly connected to and you will have a brick.

Do you know where the iPhone was originally purchased from (such as an Apple Store in a country that sells unlocked iPhones) and do you have the receipt (which will show if it is unlocked or not)?

Ask your uncle where he bought it.

ujji wrote:
sir when i activated my iphone then there is no cydia app installed on dis iphone but when i activatd my iphone 3gs then at that tim cydia was present.
so n the other iphone 4 which i have got also has cydia preinstalled on it.
so i want to know that cydia should be preinstalled on my iphone or not???

If Cydia is present on the iphone, that means that the phone has been jailbroken and possibly a hacked phone. If you do update that phone that has the Cydia on it, you will lose the jailbreak and you will lose that unlocking.

A factory unlocked iphone will remain unlocked even after you update the phone.

No, it shouldn't.

Not necessarily. WHERE did your uncle buy the phone?

deggie wrote:
If it was unlocked through a hack it will relock to whatever carrier it was formerly connected to and you will have a brick.

Don't post if you don't know what you're talking about. When you update or restore official firmware on a jailbroken iPhone, this is referred to as "re-virginizing" the iPhone, and does NOT brick it.

If he bought it from a legitimate reseller, you can update without any issues.

I agree, don't post if you do not know what you are talking about. If he has an iPhone currently on iOS 4.1 working with his carrier in India and this particular phone was previously locked to, say, AT&T and it was unlocked through use of unofficial software, when it is updated to iOS 4.3 it will lock that particular phone back to the original carrier.

Maybe saying it will "brick" it was too much for you. Okay, it will again be locked to O2, it will not work for him in India, he will not even be able to use it as an iPod, but he can turn it on and look at it. Then he can wait for a hack to unofficially unlock it or he can contact O2 to officially unlock it.

Have any problem with this?

deggie wrote:
I agree, don't post if you do not know what you are talking about. If he has an iPhone currently on iOS 4.1 working with his carrier in India and this particular phone was previously locked to, say, AT&T and it was unlocked through use of unofficial software, when it is updated to iOS 4.3 it will lock that particular phone back to the original carrier.

Maybe saying it will "brick" it was too much for you. Okay, it will again be locked to O2, it will not work for him in India, he will not even be able to use it as an iPod, but he can turn it on and look at it. Then he can wait for a hack to unofficially unlock it or he can contact O2 to officially unlock it.

Have any problem with this?

No, that is better. Too many overuse the term "brick", when in fact, it is referred to a phone that cannot be used in any way, due to damaging the phone's software so badly that it cannot be fixed, and sometimes involving hardware damage from the flashing process.

LOL, okay I promise to not use the shortcut term so as to not offend the Plano contingent.