Unlocking iPhone4 ios 7.0.3 with GEVEY

[tradememount]

hi everyone,

I have iPhone4 ios6.1.3 firmware04.10.01 unlocked with GEVEY SIM.
I like to try upgrading this to ios7.0.3
Has anyone tried unlocking 7.0.3 with GEVEY SIM?
If noneone has, I would like to try it anyway.
But is it possible to downgrade 7.0.3 to 6.1.3 if GEVEY does not work?
Any information would be appreciated.

Thanks

 

[fardeenah]

yes gevey works on 7.0.3 even if baseband was upgraded from 5.0.0 to 5.0.2. ( for 4s) rest assured

 

[tradememount]

Hi,
From googling, I found some people downgraded ios7 to 6 successfully.
So, I have been trying to upgrade my iphone4.
Got blob and IPSW for 7.0.3 and tried to create a custom firmware with iFaith.
However, I have been getting error message "startIndex cannot be larger than length of string" everytime I try to validate a blob.
Does anyone have any idea to upgrade ios6 to 7 without upgrading baseband?

Thanks,