3gs 4.2.1 stuck at jailbreake logo after reset

[shahidchuhdry]

got a used 3gs yesterday
its on 5.2.1 woth bb 5.12

i reset my 3gs by Settings/General/Reset and erase all data.
3gs gt restarted and then stuck at jailbreak logo
its 3 hour now its still stucked at that logo but it restarted after some times but every time after apple logo it stucked at jailbreak logo.

i saves .shsh via tinyumbrella,

now tel me what i can do to fix it???

its still attached with data cable n pc

 

[PsstGreek]

You need a custom 3GS 4.2.1 ipsw to restore your iPhone.

 

[shahidchuhdry]

You need a custom 3GS 4.2.1 ipsw to restore your iPhone.

any tutorial to restore with custom 4.2.1???
+1 4 u.. thx

update: restore successfuly but now its lock , wats next?

 

[PsstGreek]

any tutorial to restore with custom 4.2.1???
+1 4 u.. thx

update: restore successfuly but now its lock , wats next?

Use redsn0w to activate/jailbreak. Load in the stock 4.2.1 firmware. Then ultrasn0w to unlock in Cydia.

 

[shahidchuhdry]

Use redsn0w to activate/jailbreak. Load in the stock 4.2.1 firmware. Then ultrasn0w to unlock in Cydia.

after jail breaking it stuck at apple logo