Question about Erase the data from Unlocked iphone

[vietkool]

I got my iphone 4 and it unlocked now. I plan to sell it when the i5 release. question is if i go to setting>reset > Erase iphone after done this, is the iphone still remain unlock or I have to install Ultrasn0w to unlock again ? which way is safe to rease all data without going to restore process ?

[Mes]

You ip4 remains unlocked, but please, don't do that !!. Stay far far away from that option
For a normal non-jailbroken phone, no problems. On jailbroken phones, it will likely cause serious internal corruption. No permanent damage or harm, but it's likely to force a complete restore.

There is no easy way (except a fresh restore) to clean out your data. Some users have created 'empty iTunes backups' that can be used for this purpose. An empty backup needs an empty phone, so you can't do that now.

Maybe others have discovered an easy method that does not involve a restore.

Good luck.

[jhuff26]

I would just restore so the person can who gets your phone after you sell it can do what he wants with it from scratch

[vietkool]

oh. so the safest way is restore then jailbreak and unlock again ?

[Mes]

Yes, a restore is the best way to clean and remove old data. Keep in mind, the current firmware version is not unlockable. So a custom built older firmware is required to keep your unlock ... and .. old version SHSH blobs are required for any old version restore.

If you are unsure about what I'm describing, please read "All About SHSH" and "Tiny Umbrella" in my signature area below for great information.

[vietkool]

ok, thanks... yeah i know how to jb and unlock but just don't want to do it unless I have to. I save the SHSH since it was 3.01 I think.

[Mes]

To clean out all data, a restore is not 100% required but it's sure the best, fastest, and easiest.

If I want to clean out my personal stuff without a restore, I'll go into /var/mobile/Library and delete the following folders: Address Book, Calendar, Mail, Notes, and SMS then immediately reboot. Seems dangerous sure, but after the reboot, new and empty folders are recreated. WebClips can also be deleted, maybe more.

Deleting/changing personal settings from the Settings app, like mail accounts, and the like or personal entries in the Stock/Weather/etc apps can usually be done from the /var/mobile/Library/Preferences folder. I do this rarely, because I'm less confident it won't cause a problem. Then the passwords in the Keychaines folder to think about, and a few more bits and pieces all over the phone.

In the end, a restore seems the only 'logical' course of action for a thorough cleaning.