upgrading question

[admitz]

Uploaded with ImageShack.us

Hi guys, I'm currently using an jailbroken iPhone 4 with a 4.0 firmware.

I would like to upgrade my firmware to 4.2.1 , I have saved my shsh on 4.0 once only a long time ago.

does the green firmware numbers mean i can upgrade to those firmwares?

Thanks!

[phatcamaro]

Yes, but before you do anything download tinyumbrella & save your shsh thru there first. It's easier than using cydias in my opinion

[iYeow]

Yes, you can restore to any firmware with the shsh blobs you have in Green. Go with IOS 4.3.3 for the latest IOS version with untethered jailbreak.

[admitz]

thanks for the replies guys!

[admitz]

what i did was
1.) download iPhone3,1_4.3.3_8J2_Restore.ipsw
2.) shift click restore on itunes to the above firmware
3.) while restoring halfway it gave me the itunes error 3194
4.) tried changing my host file to # 127.0.0.1 gs.apple.com but still didn't work.
5.) use ifaith to create a custom 4.0 ipsw file and restored the phone back to 4.0 again.

not sure where i go wrong, or should i restore using a custom 4.3.3 firmware then jailbreak from there using redsn0w?

also if i managed to upgrade to 4.3.3 will i be able to do a "restore from back" to get back my contacts emails sms and settings?