App developers often share promo codes with reviewers, forums, etc. Unfortunately, Apple doesn't provide a way to track which codes have been used, resulting in wasted promotions. Fortunately, Kam, the developer of Walkabout, explains how to determine if a code is still available via iTunes.
Kam's procedure is simple but effective. First, he writes, launch iTunes and log out. Next, log back in being careful not to click Save Password. Then, quit and re-open iTunes.
With iTunes running, try to redeem a promo code you'd like to test. If the code has been used, iTunes will display a message saying, "This code has been used -- codes may be used only once." If it's still available, iTunes will prompt you for your password. Just click Cancel and mark that code as still available.
If you try this with your password saved, iTunes will redeem the code. By logging out and opting not to save your password, iTunes will let you know if the code is available without redeeming it.
Well done, Kam! Thanks for sharing your tip.
It's time to hand off your old iPhone to its new owner, but you definitely want to scrub it clean of all your data beforehand. Simple enough: in the Settings app, tap General, then scroll down to Reset and tap it. The option to 'Erase All Content and Settings' is the one you want; it will remove any trace of personalization and all your installed apps, returning your phone to factory-fresh condition.
Depending on which iOS device you're resetting, the process may take quite a while (older iPod touch and iPhones pre-3GS don't support hardware encryption, so they actually have to wipe all the onboard memory byte by byte). Be sure you're plugged into power or that the device is fully charged before you begin.
