hey.
iphone 4 is hard to unlock these days. cz its modem firmware is hard to b patched.

--if u have firmware version more than 4.0.2: u r unable to unlock it. and dont think in downgrading the firmware version. the downgrade is only for the ios not the modem firmware.--

there is a turbo sim card i can buy it for u for 370Qr to unlock ur iphone.

now there is no way to unlock via software with ultrasn0w.

only turbo sim.

search google for it.

im an apple specialist and trust me.

thank u.