Sign [Q] SU660 V30C - Slow internet - need help

Firstly Im sorry if I have wasted your time by reading this.

Im a complete newbie here and was wondering if someone could point me in the right direction.

My problem is that I have recently updated my rooted LG SU660 to V30C and the internet is soooo slow. How do I fix this?

Android version 4.0.4
Baseband 1035.21_20111119
Build IMM76L.LG-SU660-V30c.1209211340
Software LG-SU660-V30c-Sep21-2012

Thanking you in advance