Hello! I'm completely new to the whole android thing and just can't figure it out. Can't update my phone, nor can I send pictures (yes, I got a Data Plan). I don't even know where to start... I've purchased a Sony Ericsson Xperia X10a from ebay. In order to unlock it, I purchased an unlocking code from unlocking.com. Once I received my code they told me to put in any sim card and then enter the NCK code they sent me. Ok, I did all that,... and I got me a T-Mobile Simcard with 2GB DataPlan. Once I started trying to figure out the whole thing,... I can make/receive calls, but can't send pictures and can't connect to the 3G network. I finally got it connected to my wireless network at home. Also, I downloaded the PC Companion and everything. I can connect the phone to my laptop, but can't update my phone. I'm stuck at the backup. On m.sonyericsson.com/backup I've downloaded the application to backup my data, but I can't install it on my android. I get the message: "For security you phone is set to block installation of applications not sourced in Android Market." So I looked it up on my user guide and it told me how to allow download of web applications. But right there I have the next problem: I don't have an option to mark the unknown sources check box! I can't delete applications either! Did I do something wrong when I unlocked my phone? Or do I have to root the phone (even though I don't even know what that means, but I've read it numerous times online). I just don't know what to do now. I can't even disable the call forwarding when busy. It tells me: "Call settings error: Unexpected response from network." Also,... I've changed the number of my voicemail already. I've got a 630 area code, but in the call forwarding settings it has a 805 area code saved and it won't allow me to change it either. Anyone please know what to do???? I really really need help!!!