Iphone 3G(s) Problem in reboot

[bing00]

Hi,

First of all thanks for providing us support since long. But today I am facing a unique problem with my iphone. My Iphone 3G(s) had 3.0 firmware installed and I unlocked it with redsn0w 8. But it was not accepting any other sim card even after unlocking with redsn0w.
I ran blackra1n just for try but couldnt get anything. I did not want to update it to 3.1 or 3.2.1.
Now I ran redsn0w again with custom firmware 3.0 and my phones did not reboot and it stuck on apple logo and it does not come on.
I put it on recovery mode to update it to new version 3.1.2 but it says that iphone could not be restored. The firware is not build for the device but it accepts the same firmware when I try to run redsn0w.
Now my iphone does not come on and stuck at apple logo. It's not either updating with 2,1_3.0 or 2,1_3.1.2. It gives me the error that firmware is not build for the device but my Phone is 3G(s) and I am 100% sure that I downloaded the correct firmware of 3Gs.
Please guide me what to do. I can put my phone into recovery mode. I can still run redsn0w but after all the process when it restarts it stucks at apple logo and keep coming on after 5 min.
Help me please!