Custom Firmware 4.2.1 with ipad BB 06.15.00

[iphonecsc]

I have a iphone 3g firmware 4.2.1 and baseband 05.15.04. I upgraded to ipad baseband 06.15.00 using redsn0w. While restoring my phone back through itunes, I am getting error 1015.

Is there any 4.2.1 firware available having 06.15.00 baseband?

Pls suggest how to restore the phone. Thanks in advance.

Below is error from itunes
************************************************** ***************
Sending boot code...- GKEY: 0x21
OK
Automagic-ing firmware from path /usr/local/standalone/firmware...
- FLS file /usr/local/standalone/firmware/ICE2_05.15.04.fls and EEP file /usr/local/standalone/firmware/ICE2_05.15.04.eep are available
Automagic-ing firmware from path /usr/local/standalone/firmware -- All OK
Version ICE2-05.15.04 is available, ICE2-06.15.00 is already loaded
Deciding whether to update or not...
- Available version is older
!!! Exception at :0:
- BBUReturnBadArgument(5)/15: Cannot perform an automatic update to a previous version
: CMD52 Failure - SDIO Cmd Timeout: arg(0x00000a00), error count(1), dsta register(0x0000e004)
IOSDIOIoCardDevice::isInterruptPending(): CMD52 failure to read address 0005, SDIO Cmd Timeout
AppleS5L8900XSDIO::sendCommand(): CMD52 Failure - SDIO Cmd Timeout: arg(0x90000602), error count(1), dsta register(0x0000e004)
AppleMRVL868x::exitDeepSleep() Failed to write config reg - SDIO Cmd Timeout
AppleS5L8900XSDIO::sendCommand(): CMD52 Failure - SDIO Cmd Timeout: arg(0x00000a00), error count(1), dsta register(0x0000e004)
IOSDIOIoCardDevice::isInterruptPending(): CMD52 failure to read address 0005, SDIO Cmd Timeout
AppleS5L8900XSDIO::sendCommand(): CMD52 Failure - SDIO Cmd Timeout: arg(0x90000602), error count(1), dsta register(0x0000e004)
AppleMRVL868x::exitDeepSleep() Failed to write config reg - SDIO Cmd Timeout
AppleS5L8900XSDIO::sendCommand(): CMD52 Failure - SDIO Cmd Timeout: arg(0x00000a00), error count(1), dsta register(0x0000e004)
IOSDIOIoCardDevice::isInterruptPending(): CMD52 failure to read address 0005, SDIO Cmd Timeout
AppleS5L8900XSDIO::sendCommand(): CMD52 Failure - SDIO Cmd Timeout: arg(0x90000602), error count(1), dsta register(0x0000e004)
AppleMRVL868x::exitDeepSleep() Failed to write config reg - SDIO Cmd Timeout
AppleS5L8900XSDIO::sendCommand(): CMD52 Failure - SDIO Cmd Timeout: arg(0x00000a00), error count(1), dsta register(0x0000e004)
IOSDIOIoCardDevice::isInterruptPending(): CMD52 failure to read address 0005, SDIO Cmd Timeout
AppleS5L8900XSDIO::sendCommand(): CMD52 Failure - SDIO Cmd Timeout: arg(0x90000602), error count(1), dsta register(0x0000e004)
AppleMRVL868x::exitDeepSleep() Failed to write config reg - SDIO Cmd Timeout
AppleS5L8900XSDIO::sendCommand(): CMD52 Failure - SDIO Cmd Timeout: arg(0x00000a00), error count(1), dsta register(0x0000e004)
IOSDIOIoCardDevice::isInterruptPending(): CMD52 failure to read address 0005, SDIO Cmd Timeout
AppleMRVL868x: Baseband reset detected
attempting to dump restore log
writing log file: /mnt1/restore.log

************************************************** ***************

[axecom]

Create a custom firmware with preserving baseband!

Regards ,
Axecom

[iphonecsc]

anyway I can download it from net, I am using windows 7. If you know the procedure, Pls let me know. Thaks.

[iphonecsc]

Originally Posted by axecom

Create a custom firmware with preserving baseband!

Regards ,
Axecom

Thanks!
I used latest version of redsn0w and used firmware 4.2.1 to create custom firmware by preserving.

Next is to enter in DFU mode

Last step is to restore custom firmware through iTunes.