ArkieKDealer...Ok I will try and explain H2O to you.You DO NOT need to unlock the iphone to use an H2O card in it but if its already jailbroken and unlocked I would use redsn0w to deactivate it then let itunes activate the phone....You can download the profile so you can get 3g data using the H2O website but the one catch is...if you want to be able to MMS...you must jailbreak the phone so you can enable the cellular data network tab.I get really good data speeds using the H2O on and Iphone 4 but using a 3GS or 3G I always seem to get much slower data speeds...So as far as the firmware goes you are safe because its basically an AT&T card...just be aware of the jailbreak issue in order to get MMS working.
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