Hi GuysAs we are all here to help each other so i am sharing this with you.
i managed to get the internet tethering to work on my Iphone 3G 16g firmware 3.0 jailbreak and unlocked with ultrasn0w. and i have tested with T-mobile work just fine.
here is the step:
1- use safari browser type at the address on the top and type help.benm.at
2- you will see at&t and t-mobile carrier profile choose your carrier
3- scroll down choose your country
4- then click install and that it.
5- go to general and network and then u will see internet tethering avail.
6- you need to go to cellelar data network and change cellular data apn back to internet2.voicestream.com. coz after you install internet tethering it default back to wap.voicestream.com
that it have fun you all
share the info. if any one figure out how to enbale video recording in 3g firmware 3.0 without using the 3rd party app. let share it with us
good luck



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