A full beginners' guide?

Hi :)

I'm just wondering why I feel like these forums are made for only professionals :(

Need a beginner's guide please :)

Introductions to everything

For the moment I want to know

What is flashing? what it can change in my phone?

I have SE K770i CID 53 Red, I wonder if flashing my phone can make me able to add custom packs to it or patches?

Thanks :)

PS: I know I can collect the info through the threads, but I just want to see all in one topic :) thanks again

Read the following;
Flash K800 CID53 with K810 software CID53 (for begginers) - Top Sony Forums but you should use files only for K770i CID53
Patching CID53 (DB2020)DB2010,2012 - Top Sony Forums