So ever since i unlocked my phone for rogers i haven't been able to use 3g at all...
Have you entered the Rogers APN settings? They probably can be found on their website.
Cell Expert - Free tips and advice - APN Settings
Rogers Wireless Canada
You will need to create two APN's
Leave all other settings Blank.
Name: Rogers MMS
MMS Proxy: 10.128.1.69
MMS Port: 80
APN Type: mms
Separate names with a comma.