how to change frequency to 1700 -2100

The GHz is controlled by the cpu inside the phone

Open it up and solder out the SMd cpu and solder IN a cpu

If one exist with the other hardcoded GHz

Would not hold my breath though

Who is your carrier? Is it one of the ones on this list? http://support.apple.com/kb/ht1937

If not, ask them how you're supposed to do that, because it's not going to happen. If it is one of the supported carrier networks listed, it should work just fine, assuming you have a legitimately factory or carrier unlocked phone. If it's been hacked, then you're on your own.

ighosty wrote:

hi,

recently I moved to canada and I brang my iphone with me .my iphone is open , but here in Canada I was notified that I have to chage Mhz range frequency to 1700 -2100 Mhz.

the Q is how to change this

thanks adn rgrds ,Ighost

The iPhone works in the 2100 MHz band. The 1700 MHz band is used only by T-Mobile in North America; all of the other Canadian carriers use the standard bands that are supported by the iPhone. Actually, all of the GSM carriers in the world except T-Mobile in North America operate on bands that the iPhone recognizes.

Windmobile in Canada is using 1700 Mhz (AWS) which is different from all others. Here is a discussion about this topic, but nothing happened yet.. http://www.intomobile.com/2010/09/09/apple-developing-an-iphone-with-the-1700mhz -aws-band/