need help stuck on the pineapple logo
I was trying to unlock an iphone 3gs, on 4.2.1 with bb 6.15.00. I used redsnow for the jailbreak and used the ipad bb. Everything was going fine since I've done it a couple of times before with someone else's phone. However this time while entering the password for the wifi access the phone suddenly did a restart. So I went to redsnow again to boot tehtered and it got stuck on the pineapple screen.
Further readings showed up an untethered jailbreak using pwnage tool 4.2 so i decided to give it a shot since im either stuck at an apple or pineapple logo. When I was restoring the phone on itunes with the custom ipsw it prompted that I can't since the version was not compatible with the phone(not the exact words).
So now Im stuck and I don't have a clue to get out of it. I've been trying and looking for solutions for more than 20 hours now thats why im posting.
Any help would be greatly appreciated. By the way I saw some ways to get out of it using windows however im using a mac. If I miss anything please let me know. thank you