How to jailbreak iphone 4 without downloading any ipsw?

I want to jailbreak my iphone 4 GSM without downloading any ipsw i have tried every software of jailbreak like Redsnow 0.9.15b3 and sn0wbreezedl-master, ziphonewin 3.0 all of them needs a ipsw file which is 895 Mb (ipsw 6.1.3) i don't have a good internet connection so i can't download it so is there's any way to jailbreak my iphone wothous downloading the ipsw file?

Can I flash an iphone 5 to tmobile?

I found an iphone 5 and the owner locked it with a message saying to email him if found. I've sent him multiple emails and no response. So if he doesn't respond I would like to use it for myself. It is working on verizon and I wanted to know if I could get it flashed even if it's locked with his message and passcode.

Added (1). How would i go about getting it factory unlocked?
yes I'm an honest person and have actually emailed him, it's been a week now

Is there an iPhone app to stream movies from my computer to my iPhone via a network?

The ability to stream video files that are on my computer exists on other devices I own (for example I can watch video files from my computer on my Xbox 360 without having to move them since my computer and Xbox are on the same lan network).So I'm just wondering if there's a way to watch my video files on my iPhone while being connected to my Wi-Fi (the same Wi-Fi my PC is connected to). I hope I explained this in a way that makes sense.

Old GPS or iPhone maps or google maps app?

I'm going to drive from IL down to SC and I don't trust my old garmin nuvï 255 nor iphone maps lol:-) GPS update is $50 which I'm not going to spend. So has anyone used iphone maps or google maps app on long distance trips? Or I just better use old gps?

My teacher cracked my iPhone

Ok, so today we were making a slide show in class for graduation and I was trying to send her a picture with me and all my friends and I left my phone in the class room by accident. So when I got to my athletics period I asked my coach to go get it and she wouldn't let me so I was like ok i'll wait till after athletics and lunch. After that I go back and get my phone not even thinking to look at the screen and put it in my pocket, then after my mom picks me up from school, I see my phone and it's cracked! What do I do! She needs to pay for this!