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Unlike cryptic and non-informative iTunes Error Codes, jail-breaking utility redsn0w do offer useful information to diagnose possible issues. A common error encountered with redsn0w is "Usb connection problem", but despite the clear message and obvious solution to fix USB connection between the device and computer there could be other reasons for the error.

High memory usage is something most modern tabbed browser are plagued with, we have shared the excellent FireMin add-on for Firefox to tame the situation, and here is an equivalent for Google Chrome.

Working on the same concept as BarTab for Firefox; The Great Suspender for Google Chrome makes unused tabs inactive saving computing resources. The addon dramatically reduced the memory usage to 1.5x. Tab suspension not only saves memory, but also aids in a snappier browsing experience as inactive tabs do not consume other computing resources.

Microsoft Windows automatically searches for drivers online using Windows Update service every-time a new hardware gets connected, while this can be an excellent solution to get drivers for many hardware's; this also adds a long, unnecessary wait when the best drivers are already available in current installation for popular devices like Apple and Android mobile phones.

While we can easily turn-off Windows Update driver search entirely (by navigating to System Properties->Hardware tab->Windows Update Driver Settings->Never check for drivers), Here is a little handy trick to skip Windows driver search instantly for devices you are sure are available locally saving time at the time of driver searching.

UPDATE : There seems to be a bug in ultrasn0w 1.2.8 when used with iPhone 4 having modem 01.59.00 on iOS 6.1. So Pls. do not proceed with following steps until this gets fixed.

Users relying on Ultrasn0w software carrier unlock can now upgrade to Apple iOS 6.1 as it can now be jailbroken using evasi0n and is now supported by ultrasn0w 1.2.8 update, do keep in mind that you must have the baseband (modem) preserved to one supported by ultrasn0w. Follow the guide posted next to upgrade, jailbreak and unlock iOS 6.1 while preserving the baseband.