i have a 32g iphone 4 on firmware 4.2.1 (8c148) i accidently deleted something on cydia and now whenever i try too install uninstall upgrade something on cydia i get a sub-process /usr/bin/dpkg returned an error code (100) i did some research and realized i dont think you can fix it so i wanna restore my iphone i used tinyumbrella v4.30.05 and got the 4.2.1 8c148 shsh blobs im now wondering if i can use them to restore to 4.2.1 and just rejailbreak and avoid have to upgrade too 4.3
my phones never been updated got it 3 days before 4.3 came out jailbroke it with no problems and have vista and running itunes 10.2.2.1 ??????