Lol, unless jailbreaking keeps screens from cracking... I doubt it!
I don't know what problems you imagine people go to the cellphone shop with, but trust me they're not anything where my response would be: "oh, I can fix that right up for you sir! let's jailbreak your iPhone!". Lmao...
It also HIGHLY amuses me that you think running a jailbreak makes you tech-savvy!!! Hahahahahahahahahahaha!!!!!!!!!!! =0)
Ummm.... did you CREATE the jailbreak???? Oh, no...? You just ran a script? Wow!!!!! Anybody able to do that would NEVER need help with software problems... that's some next level tech genius skillz right there. Lolololol.