Lost built-in apps after JB to 5.0.1

[dbender]

I updated my jailbroken 3GS from iOS 4.3.3 to 5.0.1. I then synced with iTunes 10.5.1 to get all my purchased apps back, reload music, etc. Everything looked okay until I rebooted (I think I did this because of No Carrier message). When it came back up, I had only a few purchased apps, and no built-in apps except 3 new 5.0 apps (Videos, Newstand, and Reminders). I don't have Phone, Contacts, System, etc. And of course, not having System prevents me from checking any of the info available on the About page.

I went back to iTunes and resynced, which brought back all my purchased apps, but still no built-in apps. I do have Cydia, and it works fine. I loaded ultrasn0w to try to get rid of the No Carrier message, but I now understand that it doesn't support 5.0.1 yet. I don't know how I missed that detail before upgrading.

So now, two questions:

1. I understand I cannot downgrade to 5.0 now. Is it possible to downgrade back to 4.3.3? Anything I need to be aware of in doing so, or is the process just like I originally used to jailbreak on 4.3.3?

2. Does anyone know why I lost the built-in Apple apps? How can I get them back? Will downgrading to 4.3.3 to allow me to unlock again also take care of the missing apps?

Thanks.

Duane

PS: I'm on baseband 6.15.00, iTunes 10.5.1, OSX 10.6.8, redsn0w 0.9.9b8, iPhone2,1_5.0_9A334_Restore.ipsw (for redsn0w purposes), and iPhone2,1_5.0.1_9A405_Restore.ipsw on the phone. I need to unlock again, because I'm in Mexico and using the phone on Telcel.

[i.Annie]

1. You can downgrade to 4.3.3 if you have SHSH blobs saved. If no SHSHs, you can downgrade to 4.1.
2. Probably just a simple fluke. A restore to 5.0.1 (or downgrade if you really want to) should resolve the issue. It's happened to me before. Be sure to use a custom fw bc you are on the 6.15.00 bb.

[Mobster103]

This same thing happened to me when I jailbroke on 5.0.1 with my 3gs. It seems to me that 5.0 jb's are sometimes just bad... Do a restore to 5.0.1 official, then rejailbreak it. It should be fine

[dbender]

I did have the 4.3.3 SHSH blobs saved, and I needed to unlock, so I downgraded. Everything went fine, but when it rebooted, I had the white Cydia icon. There are evidently two versions of this problem, and mine is the one where Cydia will not open. When I click on the icon, it flashes briefly then closes to the switcher. I have tried several fixes recommended for this issue, but none have worked so far. Seems like I'm getting the tour of all possible jailbreak issues this time, after a really smooth process 9 months ago.

Anyway, I can't resolve this by running redsn0w and unchecking Install Cydia and checking Just Boot Tethered. I've tried this with the redsn0w version I originally used (0.9.6rc16) and the one I used to "upgrade" (0.9.9b8). My iPhone is currently on iOS 4.3.3, baseband 6.15.00. The About page shows carrier & network as not available. I need to get Cydia working so I can use Ultrasn0w to unlock the phone again, as I'm in Mexico and need to use it on Telcel.

Any suggestions?

Duane