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How to fix some mysterious problems.

Hi there,

I got this iPhone 3GS (built week 41 2009) that was supposed to be "unlocked". It came with iOS 4.1 and as soon as it got upgraded by iTunes to 6.0.1/BB 6.15 it went into that "No Service", "Searching" thing. Now all SimCards are invisible to it!

I tried downgrading the BB but I get the ERRNO=7 during the DFU boot. I tried downgrading iOS to 5x but I get the same ERRNO=7 in DFU Mode (then it freezes up). All with Redsn0w 15b2 and 15b3.

I went for the tethered jailbreak solution for 6.0.1 and managed to install Cydia, Ultrasn0w and even that Ultrasn0w fixer, but all to no avail....still "No Service".

I spent so many hours trying to fix this that I think at some moment I might have said to Redsn0w that my bootroom was the new one, but it seems it was the old one (according to Redsn0w)....don't know if that screwed anything.

Now the situation is this: - 3GS is stuck in 6.0.1/BB 6.15.00 and works fine except for the SimCard that is never recognized; - I can't restore the phone 'cos iTunes gives me the "unknown error 21"; - Cydia says there are no "blobs" for me (I'm too late or something) and all I got with TinyUmbrella were 2 SHSH (4.1 and 6.0.1) that I saved on my HD.

Can I go back to 4.1 ? What to do??

Please help!

asked 26 Nov '12, 06:46

Mordor2112's gravatar image


closed 26 Nov '12, 20:22

theiphoneguy's gravatar image

theiphoneguy ♦

The question has been closed for being "Solved" by theiphoneguy, 26 Nov '12, 20:22

You need to use redsn0w to reflash 6.15 or downgrade off of 6.15, either way should fix it


answered 26 Nov '12, 15:53

theiphoneguy's gravatar image

theiphoneguy ♦

DONE!!! Despite getting the EXPLOIT FAILED error from Redsnow during the BB downgrade I retried the process. Eventually it worked. My mistake was assuming I had a problem with the ipsw I was trying to restore (iPhone2,1_6.0_10A403_Restore). But it wasn't, it was the damn bootrom acting up! You just have to persist! After it flashed back to 5.13,04 the No Service/Searching message was replaced by No Sim! Everything working now. 3GS with untethered 6.0.1!

Thanks for the help!!

(26 Nov '12, 20:04) Mordor2112 Mordor2112's gravatar image

glad it worked for you :)

(26 Nov '12, 20:22) theiphoneguy ♦ theiphoneguy's gravatar image

Dfu the phone, install stock ipsw 4.1..jailbreak, software and unlock.. Or find a way to fix your ipad bb to a real iphone bb, then restore iphone once completed, then purchase or call att for factory unlock and tether jailbreak on ios 6.0.1


answered 26 Nov '12, 10:08

shimmer's gravatar image


You mean going DFU and having iTunes load the 4.1 ipsw (holding shift, right?). Does it matter I got BB 6.15.00 in the phone now?

(26 Nov '12, 15:28) Mordor2112 Mordor2112's gravatar image

no no no! do not try a stock 4.1, it needs to be a custom or the radio most likely will brick

(26 Nov '12, 15:51) theiphoneguy ♦ theiphoneguy's gravatar image

Only xx130 are brickable.. Thousands of other people in this community got it fix by the following way

(26 Nov '12, 16:04) shimmer shimmer's gravatar image

Not true. only xx130+ brick by installing 6.15. You can brick others by installing a stock fw on top of the iPad bb, corrupting the baseband, and then not reflashing.

always use a custom firmware with 6.15

(26 Nov '12, 17:03) cybr1d ♦ cybr1d's gravatar image

You know what w/e.. Unlocks for 90% of these legacy iphones are going for pennies factory unlock without deal with all software protocols to remember.. This community is slowly turning into "unlockingqa" instead of jailbreak

(26 Nov '12, 20:17) shimmer shimmer's gravatar image

we answer both questions, not one or the other. on older devices, you cant unlock unless jailbroken (or pay for an imei unlock)

feel free to browse old questions where the 3gs is prior to week 36 2011 and you'll see some bricks

(26 Nov '12, 20:22) theiphoneguy ♦ theiphoneguy's gravatar image

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Asked: 26 Nov '12, 06:46

Seen: 5,044 times

Last updated: 26 Nov '12, 20:22

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