Iphone 3gs 5.0.1 downgrade to 4.1

tapos.ready na for downgrade,
open tiny umbrella.
click tss server.
run ireb to put in DFU mode.
then restore nyo na using Custom firmware 4.1





nag error 1015 kahit di pa 6.15 ang baseband nya.
kaya i use irebrc4 to exit in recovery mo.done.

yan na version 4.1 na kasu wala pang signal kasi 5.16 ang baseband
so update kuna baseband nya using redsnow.








after update baseband
finish na..check ko ang wifi bluetooth at baseband andyan pa,.ayus,.



ready to install ultrasn0w na..



done..