bought Venue in ebay, rooted?

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Guys, i bought a phone in ebay...

Dell Venue 2.2.2 android version.
kernel 2.6.32.9-perf
build 15696
baseband version GTOUB1A132131-US

i found in it, an icon called SUPERUSER, i have to say this is my first android, so i dont know anything about this OS phone, i had a Venue Pro in past...

As i have read, SuperUser means phone is already rooted, right?

I have locked it to ATT, when i go to System Updates, browser say no updates and ATT logo appears...

My question is, if it's already rooted, which i suppose, it have no apps, but there is no software to unlock it ans use any GSM chip? something like ultrasnow in the iphones...?

Im planing to use it in mexico, so i suppose baseband also will need to be "flashed" or whatever...

Please help!
Thanks

Locked and Rooted

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If you have superuser, then the phone should be rooted already. As for carrier unlocking, there is not that I know of a way via software to unlock the phone. The best bet would be to insert a sim from another company and verify if it is still locked, then if it is have whoever sold you the phone call AT&T and get it unlocked for you. After sim unlocking, you can use a mexican sim without any trouble or requiring baseband changes.

yes, i inserted another SIM, it's locked, i contacted DELL via unlockcoderequest@dell.com, they said this phone is retail, so they would not provide code, at store, they said Dell would provide, they are playing with the ball.... :@

omg, how difficult is to setup an email account in android... pff took me 30 min, in all way because yahoo need PLUS to allow pop and forwarding, my venue pro didnt have that problem at config (and never got a plus at yahoo).. so i downloaded yahoo app from android marketplace and i had access to my email... i think i start to hate this venue, lol

email

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I have 5 email accounts coming into my Venue, though none are Yahoo. It wasn't any more difficult to set up than MS Outlook was.

Rooting is made up of 2 parts:

The superuser app
the SU binary.

The app can be downloaded from the market on any device, rooted or not. It merely doesnt do anything on an unrooted device.

The SU binary is what does the work, that you need to either flash with custom recovery or use an exploit (such as gingerbreak) to install. Though pretty much all exploits are fixed in 321+

No unlock code from DELL or Carrier...

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Ok, guys

After several frustrating calls, emails and so... neither Dell or Carrier from the phone were able to give me an unlock code... they only kick the ball from side, i contacted the Dell unlock Team, and they said:

Dear Customer,
Please contact the carrier for more assistance on this issue. We would not be able to release the unlock code as the device is in contract with the carrier.
Mobility Unlock Code Team

I paid to 1 guy in ebay to obtain the code, but, he refunded, he couldnt find a code for my device... obviously the phone was sold to me as it is... seller didnt specified it still was in contract, so... i want to ask if you know a good and serious source to try to get codes and unlock this device...

Any help will be very appreciated...