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How to fix some mysterious problems.

My nephew just moved back from the U.S. and has his AT&T 3GS. Tried to unlock so that he can use his SIM card from Blackberry.

Restored it to 4.3.3, jailbroke and installed Ultrasn0w via Cydia. Now, No network connection when the new SIM is installed.

Baseband is on 06.15.00, have tried removing and re-inserting SIM, nothing. Re-installed ultrasn0w and still nothing.

Even tried iPhone Explorer, but cannot see a media directory.

Any help would be greatly appreciated.

asked 05 Jun '11, 23:11

rfengineer's gravatar image


are u on t-mobile usa? if u are turn off 3g

(05 Jun '11, 23:22) 1L1keTurtles 1L1keTurtles's gravatar image

If you're on T-Mobile turn off 3G, also try reinstalling Ultrasn0w.


answered 06 Jun '11, 00:48

JonSeals's gravatar image

JonSeals ♦

The iPhone is obviously outside the US

(06 Jun '11, 00:51) knightz4u knightz4u's gravatar image

Remove Ultrasn0w and reboot your iPhone before attempting to reinstall ultrasn0w again. Also report back what version of ultrasn0w you have.


answered 06 Jun '11, 00:53

knightz4u's gravatar image


by reboot i mean complete shut down by holding the power button until the red "slide to turn off" comes up.... you should slide ofcourse :-)

(06 Jun '11, 00:54) knightz4u knightz4u's gravatar image

only a reboot (restart) will fix this.

and i hope you've installed ultrasn0w version 1.2.3


answered 06 Jun '11, 08:06

raviraj%20jailbreak%20guru's gravatar image

raviraj jailbreak guru

edited 06 Jun '11, 08:10

Yes, had ultrasn0w version 1.2.3. He was with AT&T.

Ended up getting it to work but needed to downgrade to O.S. 4.1


answered 06 Jun '11, 15:02

rfengineer's gravatar image


For some reason the latest Ultrasn0w 1.2.3 is not always stable, and i have found that earlier versions were stable and using one of them has solved the same issue for other people before.

You can not get the earlier versions from the repository anymore, however i have kept copies of these older versions which might be useful to you or others, the links are below:

Ultrasn0w 1.2.2

Ultrasn0w 1.2.1


answered 06 Jun '11, 23:23

knightz4u's gravatar image


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Asked: 05 Jun '11, 23:11

Seen: 21,473 times

Last updated: 06 Jun '11, 23:23

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