Hi everyone, I have an official unlock Iphone 3G from New Zealand and i'm using it in Taiwan with the a non-iphone carrier. After updating to firmware 3.1.3 i got Tethering back on and it working wonderfully and for me tethering is extremely important. But yesterday when i connected my iphone to my laptop, itunese prompted me to download a new carrier update. Should i update? Do you think it'll deactivate native tethering on my iphone. I dont jailbreak my iphone and never will. P Please guys tell me what does that carrier update means. And i'm not with the official iphone provider in Taiwan. Please HELP!