3gs 6.15 baseband help somebody

[juquan]

Please some one help or point me in the right direction, apparently im missing something or a step is there a tutorial or a link to help me update my 3gs 6.15 baseband, ive been unsuccessful for 2 days now...Ive tried snowbreeze created the custom fw but iTunes keep shutting down then when is doesnt shut down i get error 21,,, ive use custom fw already jb wtf,,,is there any step by step guide or the tools i need

[Simon]

You need to enter pwned DFU before you can restore to a custom firmware. Redsnow is the best tool for entering pwned DFU.

[juquan]

ok thank got all the way to the end gave me error 1015 wtf

[Simon]

You got a 1015 error restoring to a custom firmware or regular firmware?

[juquan]

custom fw made with snow breeze... all the way to the end then final sec error 1015

[Simon]

Very odd to get a 1015 error with a custom firmware. There shouldn't be a baseband update in a custom firmware which is what 1015 error is related to.

[juquan]

restoring iPhone software
verifying iPhone software\verifying restore
then restoring fw
then 1015

[Simon]

Whats the filename of the firmware you are choosing to install to in iTunes?

[juquan]

it say sn0wbreeze 4.3.1

[Simon]

Did you do expert mode?

[juquan]

is there any custom fw out there to download all ready for baseband 6.15 for 4.3.1..are do u have any suggestion

[Simon]

Normally a custom firmware has no baseband update in it so you wont get that 1015 error. My suggestion would be to get a pwnage tool made custom 4.3.1. Try googling for one.