When you put your sim in the phone and it asks you if you want it to load the settings, do it.  After they install, your phone will work but not fully.  Mms wont function correct, nor will gps or your internet.  Heres what you need to add to optimize your phone.

 (I'm putting in at&t specs but change per your carrier)

settings/advanced settings/connection/connections/  click manage existing connections,
go to the bottom of screen and click edit,  bottom again and click next,  bottom again and click next,  heres the edit needed...
User name:  wap@cingulargprs.com
Password:  CINGULAR1
Domain:  leave blank
Click finish and you now are set up.

To optimize further, call your carrier and ask for tech. (level 2 tech is needed for this on at&t)  have tech "force" the imei in the system.  Trust me, highest tech can do this.  Once its in, your phone will now communicate with your system optimally.  You should notice faster download speeds, I know i did.  (I used to be top tier tech at at&t so i know a few tricks)

Hope this helps a few people out.  Any further questions feel free to msg me...
   

give them a call and ask or browse the net...  im not in canada so its not info i have memorized... 

i found some settings at xda for att. realllly makes pages load faster,im loving it now,,On the address bar, type in opera:config

Go 3/4th of the way down on the list and you'll find PROXY.

now on the fifth line you'll see HTTP server and you'll type in wireless.cingular.com:80

Go down a bit and you'll see USE HTTP. check that box.

Save. Exit and restart Opera.   also here is the thread i got it from  http://forum.xda-developers.com/showthread.php?t=627318    i forgot to mention i'm using these combined with Kawgirlval's settings