Help Internet lagging

[Miracool]

Hey all you android fans. I bought my samsung galaxy ace week ago and everything was fine with watching videos on youtube, but last 2 days its lagging a lot. Can't watch nothing on youtube without lagging every few sec. Not sure if I screwed that with some apps I dl-ed. Don't know what else to say. Try help if possible, if not, tell me how to restart (and something about that like, does it erase my "configurations", apps and so? ).
Sorry for my english and thanks in advance

 

[aktifit]

1. samsung galaxy ace comes with a task manager, try clearing memory (this kills most applications and services running in the background). if it runs fast again, at least one of your apps is a cpu/memory hog, i think there's tools to find out, it's called watchdog or sth like that but i'm not sure anymore.

2. if clearing memory didn't work, reboot your phone, see if that helps. also check how much free memory you have after a fresh reboot.

3. if nothing helps, i recommend doing a factory reset and start from scratch, if that doesn't help either your phone is definitely broken