iPhone 4 running 4.3.1. Never jailbroken before. Thinking of trying first time. So I just download redsnow and run it, it will take care of everything? What is this signal problem I'm hearing about? Will this JB cause problem with signals and cellular service? As much as I want to JB but I don't want to lose phone it's prime facility of being a phone.
Like every other discussion forum on the Internet, more people are going to post when they have problems and not when everything works as designed.
The worst case is that you restore from the back up you took before you started the jb process.